Usain Bolt and Yohan Blake breeze through 100m heats

The Jamaicans breezed through the 100m heats but USA's Justin Gatlin and Tyson Gay and Team GB's Adam Gemili and Dwain Chambers also looked sharp. Report by Morrism. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn