Bolt bids for 200 gold with all eyes on record

Usain Bolt of Jamaica runs ahead of Shawn Crawford of the U.S. and Alonso Edward of Panama (L-R) to win in the men's 200 metres semi-final heats during the world athletics championships at the Olympic stadium in Berlin, August 19, 2009.

BERLIN (Reuters) - Jamaican Usain Bolt returns for an encore, this time in the 200 meters final, at the world athletics championships Thursday.

The triple Olympic champion will be targeting his world record of 19.30 seconds on the sixth day of the championships.

Bolt already has taken down his own 100 meters world mark, running a stunning 9.58 seconds Sunday.

He set records in both events at the Beijing Olympics.

Gold medals also will be at stake in the men's 110 meters hurdles, the decathlon, the women's high jump and the women's 400 meters hurdles.

Cuban world record holder and Olympic champion Dayron Robles struggled in men's hurdles preliminaries with a hamstring injury and was uncertain of his availability for Thursday's semi-finals and final.

(Editing by Ian Ransom)