Impact

The world is overrun by an unimaginable horror. The few surviving humans are scattered in tiny outposts across the world, hoping for reprieve - or death. Waiting on the runway of the abandoned Las Vegas airport sits the B-52 bomber Liberty Bell, revving up for its last, desperate mission. On board - six crew members and one 10-kiloton nuclear payload. The target is a secret compound in the middle of the world's most inhospitable desert.

All the crew have to do is drop the bomb and head to ...