Space Debris Narrowly Misses Airliner
The space debris problem is a lot like a nuclear reaction - collisions happen and debris is released which causes more collisions and the reaction continues at an exponential rate. It could get to the point where space navigation will no longer be viable.
Interesting fact - a piece of space debris the size of a small marble, traveling at 22,000 miles per hour, has the kinetic energy of a 400 pound safe dropped from about 100 feet. Imagine the damage that would result if a marble-sized object were to collide with a space craft.
It would be great if we found a way to fix the space debris problem.