LAX Dry Ice Bomber's Access to Secure Areas Scrutinized

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Despite not necessarily being deadly, Goodpaster said under certain conditions dry ice can cause burns, small explosions and could even asphyxiate a person if they were to be in a room with dry ice and no other source of air.

The danger of the dry ice bombs depends on the amount of dry ice, the size of the container and the container's rigidity, Goodpaster said.

"The basic principal is that dry ice is solid carbon dioxide and then what it does is it sublimes, which is a process of turning into a gas," he said. "If you put it into something rigid, then inside of that container the gas builds up and then the pressure builds up until the container ruptures and then you get an explosion."

ABC News' Josh Margolin contributed to this report.

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