[gaijin]

The Japanese cult AUM shinrikyo attacked the Subway because it was a confined airspace.

they were using chem weapons specifically the nerve agent sarin as a weapon.

they had several open air tests attacks that failed but the subway one succeeded in killing I think 6 or 7 people. It also sent thousands to the hospital because the agent does not disperse.

it stays concentrated in the subway tunnels.

My guess is that they might have a nerve agent or something.

[11Bush]

You don't need something as exotic as an actual nerve agent. All you need is a gallon of Clorox bleach and a large container of Comet cleaner. There are several delivery means that would allow the person to set and time delay the activation.

The terrorist lives, in the kitchen.