In 1987, an American endurance swimmer called Lynne Cox swam across the "Ice Curtain" between the USA and the Soviet Union. The Diomede Islands in the Bering Strait are only 2.7 miles apart, but divided by near-freezing water and Cold War rivalry. Lynne Cox spoke to Simon Watts about her swim in 2012. This programme is a rebroadcast.
PHOTO: Lynne Cox on the Bering Strait. (Copyright Rich Roberts)