The art of defusing a second world war bomb

17 hours ago (theguardian.com)

My aunt lives in Hamm, Germany. It used to be a massive rail road hub and allies bombed the f* out it. The old church sitting middle of the town still carries the scars of bombing. Few years ago, during the renovation of the shopping mall, construction crew found unexploded American 500 lbs bomb in the ground. City had to evacuate a lot of people. Throughout years, there were multiple other incidents with UXO in Hamm, that I can recall. I still wonder how the 500 pound bomb been sitting in the ground so many years, right in the center of the town, right by the shopping mall and no one noticed.

  • As a German living in Berlin it's still pretty normal that once in a while WW2 bombs are found during construction. Heavy bombs that didn't explode probably penetrated the ground quite a bit so when rebuilding it was probably just easier to just leave them there. That's just a guess.

    There are also still bombs and grenades in the rivers. There are some magnet fishing YouTube channels where you can occasionally see them pulling up stuff like that.

    • > so when rebuilding it was probably just easier to just leave them there. That's just a guess.

      My take (equally guessed): Among the literal rubble spread all over the cities, people constructing everything back up with whatever means possible couldn’t even recognize a mostly buried object as a bomb (instead of just more scrap from a collapsed building).

      So less of an active decision to not deal with it, rather one out of necessity and/or not knowing about them, perhaps?

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  • Yeah, bombs are found regularly. A special case was about 15 years ago when there was a bomb in Munich they couldn't diffuse and which in consequence has been exploded purposly right in the city: https://m.youtube.com/watch?v=dJwE2wLJKKc

    That was a quite impressive experience. Windows in the surrounding area broke and straw, which they used to damlen the shockwave, caught fire and was thrown around.

  • True further east, here in former Germany, now Poland. Especially throughout the construction and investment boom that's been happening since 00's. Just last year my neighborhood was evacuated.

    Unexploded Soviet ordnance - insane how much of it was dropped and buried in the rubble to this day. You're right though - weird to think that nobody would notice, but so much Europe was turned to rubble at that time. These things got turned to unrecognizable rusty mush after a few decades.

    Pretty sure it's also an excuse to keep the bomb squad and evacuation procedures in practice. These things are pretty routine, there is no fear or panic. IThey just diffuse and take the thing away to some military range to dispose of it.

    • "Pretty sure it's also an excuse to keep the bomb squad and evacuation procedures in practice."

      Definitely not in this eastern part of germany where I live. Every major construction needs to check for bombs, but it also happens randomly that a excavator finds a bomb.

      There were just a looot of bombs dropped. (And they don't always move it, often it is too rusty also to defuse and then controlled explosion if the surroundings allow it (they use lots of water bags on top, witnessed it once))

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  • 9 years ago in Thessaloniki Greece, another 500 pound bomb was found 70000 people were evacuated, the disarming took 30 minutes reportedly. Last week they found 1000 pieces of various unexploded ordnance in the city's harbor, leading theory is they were dumbed during the German withdrawal in the second world war.

  • It really is very common here in Germany to get an alarm that a WW2 bomb was found somewhere near you, telling people close by to evacuate. Like every couple of months. It doesn’t even register with people, I don’t know if the news even report it.

  • > I still wonder how...

    A 500 lbs bomb falling from altitude can bury itself a fair ways in soil. Most of its fellow bombs will have good fuses - and with the mess they make, it would take some careful excavation in just the right spot to find the dud bomb. (Or, maybe it fell in a patch of overgrown brush in a park, or in a river, or a farmer's pond, or ...)

    And with the scale at which Germany was bombed in WWII, there was nothing remotely resembling the resources to carefully excavate all the myriad square miles where dud bombs might have fallen. Either during the war, or after.

And the mother of all unexploded WW2 ordance is the SS Richard Montgomery.

1.4kt of explosive sat in the Thames Eastury, 35 miles down river from central London, that nobody knows how to get rid of.

"it was determined that if the wreck of Richard Montgomery exploded, it would throw a 300 metres (980 feet)-wide column of water and debris nearly 3,000 metres (9,800 feet) into the air and generate a wave 5 metres (16 feet) high. Almost every window in Sheerness (population circa 20,000) would be broken and buildings would be damaged by the blast."

https://en.wikipedia.org/wiki/SS_Richard_Montgomery

  • Isn't that a kind of thing you just have to bite the bullet and deal with directly, because waiting only makes dealing with it more expensive with time?

    Just evacuate the people and blow it up, accepting that it'll inconvenience a lot of folks and the national budget even more, but will also briefly revitalize the local economy, as every contractor there is will maximize the opportunity to suck out the funds set aside for repairing buildings damaged in the explosion - and make sure to record the disposal itself from every possible angle, with most expensive cameras government can buy, as selling clips of it to the media industry would be a licensing goldmine and recoup some of the costs.

    Hell, turn it into a spectator event, and tourists coming to see it may just pay for the whole thing.

    • I think the 1960s salvage effort of the similar SS Kielce which detonated while they were trying to remove the explosives put off similar efforts for SS Richard Montgomery. Mind you, I'm not sure what they thought would happen since they attempted to clear debris from the wreck with explosives.

      https://en.wikipedia.org/wiki/SS_Kielce

    • According to Wikipedia the leading plans were more like evacuate everyone, build some protection around it, then dissemble it one piece at a time and blow the pieces up individually.

      This makes sense if you can tolerate some chance of the whole thing blowing up, but you'd still prefer not to replace all those windows.

    • Yes, but why be the politician or civil servant responsible for dealing with it when it will most assuredly be someone else's problem in a few years? The political upside of getting it done is low, and the risk and cost are high.

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    • If they can spend 5 millions just for mast removal, I am pretty sure they could build some rough reinforced concrete dome / something similar all around it (15m depth ain't something impossible to build on) that could absorb most of the blast.

      Say 50 million budget. Of course red tape, bureaucracy and just laziness/incompetence of state bureaucrats would make such budget balloon and drag for a decade or two, but it should be doable.

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  • So a cautious person would naturally wonder when will an adversary (such as Iran?) choose to do something with this situation.

  • Small point: People throw around the "kt" label when it means very different things in context. Nuclear weapons are generally measured in TNT equivalent, the hiroshima bomb being roughly 15,000 tonnes equivalent (15kt). This is so common that "kt" has blurred in the mind and we forget that different explosives can be considerably more or less powerful than their TNT equivalent.

    The 2020 Beirut explosion involved 2,750 tonnes of ammonium nitrite which exploded with a force equivalent to 1,100 tonnes of TNT.

    The SS Richard Montgomery sank with 1,400 tonnes of explosives, of a variety of types, some of which could be more powerful than TNT.

It’s worth tracking down a UK miniseries called “Danger UXB” that was made in the early eighties. Not sure how accurate the actual on screen dry ice and cut the red wire stuff was but as a character study of the men involved and the danger they were constantly in it was compelling viewing. Heartbreaking too. One of my favourite TV shows

Wonderful article. Reminds me of my experience scuba diving in Croatia. My group and I were doing a seabed waste-collection dive, and part of it was an obligatory training on ordnance. The sea there has had a fair few wars and conflicts.

I remember being astounded by how the water "amplifies" the explosions - so while a hand grenade blast is very dangerous on the surface, under the sea it becomes far more horrific prospect, due to the water transferring the blast more efficiently. Nerve wracking stuff, when you're thinking about diving down there - imagining that a bomb dozens of meters away could pulverize you.

Still pretty rare, thankfully. I applaud the diver bomb disposal squads - some of the most dangerous work there is.

  • > I remember being astounded by how the water "amplifies" the explosions - so while a hand grenade blast is very dangerous on the surface, under the sea it becomes far more horrific prospect, due to the water transferring the blast more efficiently.

    Curiously, it is exactly the opposite in many video games. In video games water often protects you from the explosion. I wonder, where did this trope came from...

    • It is more correct to say that air because it compresses dissipates explosions. Water doesn't amplify them, but it is still going to be a lot worse than air.

      My guess is water protects from nuclear radiation and they get confused. Anyone else want to guess where the trope came from?

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    • Roughly speaking, air/liquid interfaces are excellent protection from explosions, and more are better.

      The torpedo defense systems in the most advanced WWII battleships & carriers were about 5 layers thick: sea (may contain enemy mines & torpedoes) | empty compartment (air gap) | ballast/fuel tank | air gap | ballast/fuel tank | yet another air gap | important stuff (engine rooms, powder magazines, whatever)

      And to be reasonably effective, each air & fluid layer needs a certain thickness - which scales roughly with the size of the explosive charge.

France has a much worse disposal problem. They're still cleaning up unexploded WWI artillery shells. That's been going on steadily for a century, and there are still large keep-out zones. Estimated completion in another century.

  • I'm pretty sure if you've seen figures in the 100 year range, that's something that was largely aspirational, put out after the 100 year anniversary of the armistice. Some of the experts in France still say over 500 years at the current rate of remediation.

  • Surely, these rouge zones can be turned back into useable areas- after the bombs are defused. If there was lots of lead, then the produce from those areas would be poisonous though..

We got an alarm delivered via phone here in Berlin a few weeks ago notifying of an evacuation zone near our office where they had found a WW II bomb. Big enough to evacuate everyone in a 500 meter (I think) radius. Our office was outside of the evacuation zone.

It was slightly funny because I configured my phone to use a weird chipmunk voice to read stuff out loud apparently (not a feature I use) and it actually started reading out the message. Big WTF. moment until I figured out. Grabbed my attention though and it was the first real alarm I've received. We get a practice alarm message every few months.

> Fuller also marvels at the detailed records local wardens kept. They saw the danger that unexploded bombs would pose for future generations. In keeping those records, they reached out a helping hand from past to present.

This is a great vote for documentation and keeping records.

You never know piece of trivial information may prove vital down the road. You also don't know how long in the future a current piece of critical information will stay critical.

A few years ago I stumbled across a little museum called Brenzett Aeronautical Museum on the south coast of England. It was ram packed with a varied mix of exhibits, including quite a lot related to bomb disposal, which you tend not to see in the larger and more curated museums. It was also manned by some exceedingly knowledgable and enthusiastic people who were more than happy to chat about the exhibits.

I think it closed for a few years but seems to have reopened. Hopefully it's still got the eclectic collections and the knowledgable staff.

One of the many interesting exhibits was some pipeline and information about Operation Pluto; that was for getting fuel over to France following D-Day.

https://romneymarshhistory.co.uk/pluto

https://www.rmwcollection.co.uk/

https://aviationmuseum.eu/Blogvorm/brenzett-aeronautical-mus...

> By 9pm the cordon had crept up to 600 metres, encompassing a further 500 homes, cleared block by block by police officers.

I was recently reading Malcolm Gladwell's new book about gun violence.

One thing that really stood out:

Most European countries have MORE police per capita than the US.

I read this article yesterday and it’s the latest in a long line of really enjoyable real world stories from The Guardian lately. In a world where it seems harder and harder to get people to engage with long-form content rather than just clickbait, it’s nice to see some organisations still publishing good quality articles.

How often do WW2 or WW1 bombs actually explode, injuring or killing people? I would have thought that, for every bomb found and defused (or controlled-exploded) there would be one that isn't detected and banged around a bit...

  • It probably depends, but for example in the German state of North Rhine-Westphalia, between 1000 and 2000 bombs are found and defused each year. The last uncontrolled explosion was in 2014, killing one person.

I've seen one of those little robots before. My friend found what looked like a hand grenade while breaking up concrete/brick work in a house renovation. We called the police and fortunately we live right near to a Royal Engineers base with a bomb disposal team. They came out in their van and brought out the robot to have a look then picked it up and took it back with them in the van.

  • The current models are much fancier but until 2019 they were using various variations of the old Alvis Wheelbarrow, which dated all the way back to 1972!

    https://www.rafmuseum.org.uk/research/collections/remotec-wh...

    They were a fairly common sight on the streets of Belfast in the 1980s/90s, where carrying out controlled explosions on unattended vehicles proved to be a remarkably effective deterrent against illegal parking...

Yes, that’s pretty normal here. After the war ended, a lot of it was disposed of by the public, and there’s still much more waiting to be recovered from rivers and ponds. Before anything can be built, it must be verified that there is no longer any ammunition in the ground. That’s why construction projects here sometimes take longer. But this profession has a future. And you can only make a mistake once.

Translated with DeepL.com (free version)

Having to analyze 80 year old bombing records during new constructions adds to the long list of downsides of wars

> Bomb disposal is a dangerous job but, Hambley told me: “Knowledge dispels fear.”

In some places bomb disposal technicians are only allowed on the job for a limited time. Then they move to the "back seat" and consult or assist from far away. Because with years of knowledge and experience comes the kind of confidence that doesn't apply well to unknown devices rusting in the ground for close to a century. Misplaced confidence is dangerous.

Does it work the same way in the UK?

  • > Then they move to the "back seat" and consult or assist from far away

    Probably not. The article mentions two active bomb disposal soldiers whose rank is Major or higher, and a colonel who oversees operations. This seems like a standard military career progression, not specific to the EOD regiment. In the armoured infantry, for example, a company commander (i.e. a Major) might still fight as a dismount, delegating a sergeant to stay in their vehicle to command it.

    Also note that in the British Army, soldiers of all trades often move jobs every couple of years, sometime returning to a particular organisation but now with a higher rank.