It was a year ago that the military destroyed a defunct satellite, loaded with Hydrazine fuel. Now they say there is absolutely none of that debris left in space. On the other hand, a Chinese satellite that was destroyed is still a problem. An Air Force official to the Air Force Association in Florida, that debris from a Chinese satellite that was shot down with a ballistic missile may remain in space for another 80 to 90 years. The military is tracking more than 18 thousand pieces of space debris.