NASA Test Shows Foam Could Be Culprit
Ben Hutchings writes "The BBC has a report on an impact simulation that aimed to recreate the impact of insulating foam on Columbia's wing. The result was a large hole that probably could not be repaired in orbit even if it was known about."
As the other guy said, gwernol is wrong. And the only reason there is right-wing knee-jerk reaction towards environmentalism is because its a big load of crap. Mt. St. Helen's did more environmental damage/pollution than the (rest of the) 20th century.