Usain Bolt: I'll be remembered as unbeatable and unstoppable - video

Usain Bolt says he will be remembered as 'unbeatable and unstoppable' when he calls time on his sprinting career. Bolt is due to retire following the world championships in London which take place later this month. The Jamaican will be competing in the 100m and the 4x100m relay at the championships Usain Bolt: Lose? I can't believe you're asking me. We won't have that problem