With the Chemical Weapons Convention (CWC) awaiting action by the U.S. Senate, the treaty's supporters are asserting that the Tokyo subway poison gas attack demonstrates the need for U.S. ratification.

CENTERFORSECURITYPOLICY: Blowing Smoke About Making Deadly Gas

The US government had previous funded MIT to do research into how carbon nanotubes could be used to detect nerve toxins including Sarin following a terrorist attack on the Tokyo subway which killed 12 people in 1995.

BBC: MIT pencil 'draws' gas sensors onto paper