Jamacian Usain Bolt became the first man to hae ever defended both 100m and 200m Olympic titles when be timed 19.32 seconds in the 200 metres finals to win another gold medal. Results: BOLT Usain 19.32, BLAKE Yohan 19.44, WEIR Warren 19.84. Meanwhile, Kenya’s David Rudisha strikes gold in new 800m world record.
