The US gave them a run (HA!) for their money, but Jamaica proved their sprinting dominance. Usain Bolt, Jamaica's anchor (last runner in the relay) snagged his third gold medal in the London games.
It all came down to an anchor sprint between Tyson Gay and Usain Bolt. For about four seconds it they were neck and neck -- and then Bolt remembered he was the fastest man in history. He easily pulled ahead to finish Jamaica's relay with a time of 36.85 seconds.
This marks Bolt's sixth Olympic gold.