Olympic trials 2012: Usain Bolt safely into 100m semi-final at Jamaican National Championships "Sunday, Sunday, Sunday," said one of his handlers, referring to the final day of the four-day meeting when Bolt will conclude his campaign in the 200 metres final. Former world record-holder Asafa Powell also advanced safely in 10.19sec though he was actually edged in his heat by Nesta Carter, who was awarded the same time. The first round of women's 100 heats was originally scheduled for Thursday but with only 20 women in the field, the heats were scratched and all competitors advanced to Friday's semi-finals. Melanie walker, the defending Olympic 400m hurdles champion, was more than a second quicker than her closest rival as she won her heat in 54.88sec while Novlene Williams-Mills, one of Christine Ohuruogu's key rivals in London, made comfortable progress into the semi-finals.