21.   It tried to conceal its program to produce nerve agents.

22.   Meselson said nerve agents bind to enzymes in the body and both the enzymes and the agents break down after a week or so.

23.   Nerve agents penetrate the skin and kill quickly.

24.   Nerve agents such as VX, sarin, tabun and soman are harder for terrorist groups to manufacture.

25.   No one coughs, so we step through a magnetically sealed door to the collection of rooms where the real nerve agent is made, handled and neutralized daily.

26.   On the other hand, neutralizing nerve agents in a chemical process produces sludges and waste materials that have to be safely transported somewhere else.

27.   One nerve agent, VX, is so toxic a drop on the skin will kill.

28.   Other reports have indicated that allied air strikes on known Iraqi chemical storage sites may have blasted nerve agents into the air.

29.   Rather, I played with deadly nerve agents and lived to write about it.

30.   Readings confirmed positive for nerve agents.