Comment by somenameforme

Wiki has a pretty nice article on what went into the sarin attack. [1] A brief quote:

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"The Satyan-7 facility was declared ready for occupancy by September 1993 with the capacity to produce about 40–50 litres (11–13 US gal) of sarin, being equipped with 30-litre (7.9 US gal) capacity mixing flasks within protective hoods, and eventually employing 100 Aum members; the UN would later estimate the value of the building and its contents at $30 million.[23]

Despite the safety features and often state-of-the-art equipment and practices, the operation of the facility was very unsafe – one analyst would later describe the cult as having a "high degree of book learning, but virtually nothing in the way of technical skill."[24]"

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All of those hundreds of workers, countless experts working for who knows how many man hours, and just massive scale development culminated in a subway attack carried out on 3 lines, during rush hour. It killed a total of 13 people. Imagine if they just bought a bunch of cars and started running people over.

Many of these things sound absolutely terrifying, but in practice they are not such a threat except when carried out at a military level of scale and development.

[1] - https://en.wikipedia.org/wiki/Tokyo_subway_sarin_attack