The London Philharmonics recorded all 205 national anthems. Each one is supposed to play for 60- to 90-seconds as the flags are raised at the medal ceremony. The challenge was that one anthem naturally runs 7-minutes and had to be uber-edited. Another one was just 15-seconds long and had to be stretched into a full minute.

Trivia: Even though 205 anthems were records, more than 120 of them have never been heard at the Olympics. An athlete representing that country has never one a gold medal