[Amelia]

I can understand that they don't want the debris moved around, just because the location & aspect might give clues...but I'm having trouble understanding the toxicity thing - were they doing biological experiments up there, or is it just the materials the shuttle was made of?

Yesterday, one of the reporters or NASA people said the fuel components were toxic - but they mentioned hydrogen gas, ammonia, and nitrous oxide - most of which it seems would have been vaporized coming through the atmosphere.

[snopercod]

but I'm having trouble understanding the toxicity thing

There is no hazard. They just want to scare people into staying away from it.