Space Collision

From the CSM:

The collision between a US and Russian satellite some 500 miles above Siberia has raised concerns about the threat posed by orbital garbage.

A few minutes before 5 a.m. GMT on Wednesday, a US Iridium communications satellite and a defunct Russian military communications satellite smashed into each other, creating at least 600 pieces of debris that each could strike other satellites. It was the first time that two intact orbiting spacecraft have crashed into each other, say officials.