Pistorius on course

Double amputee Oscar Pistorius Sunday reached the World Championships 400m semifinals as defending champion LaShawn Merritt also qualified -- a month after returning from a drugs ban.
The controversial 'Blade Runner', who runs with carbon fibre prosthetic running blades, was third in his heat with a time of 45.39sec, qualifying 14th quickest overall for Monday's semi, with the final being run on Tuesday.
The issue of whether the blades give the South African, cleared three years ago to run against able-bodied athletes, an advantage is back in the spotlight following Pistorius's qualification for the worlds in South Korea.
Pistorius, 24, had both legs amputated below the knee when he was 11 months old because of a congenital condition that meant he was born without fibulae -- lower leg bones.
"I am tired. I need to cool down now, to relax, refocus and chat with my coach. I had a good race. I am just pleased to be part of this sport, of this event," said Pistorius, a four-time Paralympic gold medalist.
"Being here has been a goal I have had for many years. I have worked extremely hard to be here and it has been phenomenal to run today. It has been a lot of pressure in the race, and there is a lot of work for tomorrow. I need to be as consistent as today."
Merritt's time of 44.35 was the fastest in the world this year and saw him top the qualification standings.
"I have been training very hard for a while to come out like this today. I will take it round by round. It was a comfortable race. It was not hard for me. Now I am just getting ready for tomorrow. I made my statement today as defending champion," he said.