HOW-TO See how to protect rooms from biochemical attacks. liv_diy_hammer.jpg 60x45 home http://abcnews.go.com/sections/GMA/videofiles/Video/030212hazelton_video.ram 10380060366170 abcnews_free.gif lock_icon.gif superpass.gif http://abcnews.go.com/sections/GMA/videofiles/Video/030212hazelton_video.ram 10380060366171 PLAY lock_icon.gif superpass.gif lock_icon.gif lock_icon.gif headline