CNN The Situation Room April 18, 2013 05:37:00
Hydrogen. when exposed to humans, it can cause breathing dpif cu ining d earation of the eyes, nose or throat, exposure in high concentrations can lead to death that. of course, is the big concern here. when it's released in the air, the vapors initially move close to the ground, causing a greatest risk for exposure. >> that takes a states policeman spoke to the media after returning from the area close to the blast. he described a scene of wide devastation. >> i can tell you, i was there. i searched through the scene, i was in some houses tonight. devastating. massive. just like iraq. just li...
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