O'Rourke cruises into World Championship semi-final

Derval O'Rourke cruised through to the semi-finals of the 100 metres hurdles at the World Championships in Berlin this evening, clocking a season's best time of 12.86 seconds.

O'Rourke got off to a lightning-quick start in her heat, reaching the first hurdle together with Australia's Sally McLellan, the fastest woman in the entire field this year.