[fooman]

PC kills. If it turns out to be the foam made out of PC, non-cfcs, then it will ready suck.

This current guy talking is a weany so far.

[steveo]

This current guy talking is a weany so far.

So you could do a better job I guess?

[Poohbah]

I don't see how using one set of materials or another would've saved these folks. They had a better chance of surviving the shuttle hitting the control tower at KSC during landing.

[Jael]

http://ltp.arc.nasa.gov/space/team/journals/katnik/sts87-12-23.html

During the STS-87 mission, there was a change made on the external tank. Because of NASA's goal to use environmentally friendly products, a new method of "foaming" the external tank had been used for this mission and the STS-86 mission. It is suspected that large amounts of foam separated from the external tank and impacted the orbiter. This caused significant damage to the protective tiles of the orbiter.