Watch Final Target: Planet Earth

There are countless comets and asteroids in our solar system. Some of them pose a threat to Earth. A hit by one could take out an entire city, or obliterate all life on the planet. Scientists from many countries are working to not only identify which comets and asteroids are potential threats to Earth, but how to counter those threats and ensure humanity's survival.

Final Target: Planet Earth is a 1997 documentary with a runtime of 49 minutes.