Jamaica's Usain Bolt hugs second-placed compatriot Yohan Blake (R) after winning the men's 100m fina
Jamaica's Usain Bolt, right, leads United States' Ryan Bailey in the men's 100-meter final (AP)
Picture provided by Omega shows the photo finish of the men's 100-meter final (AP)
Jamaica's Usain Bolt celebrates after winning the men's 100m final (Reuters)
Jamaica's Usain Bolt, third left, crosses the finish line to win the gold medal for the men's (Reute
Jamaica's Usain Bolt reacts to his win in the men's 100-meter final (AP)
Jamaica's Usain Bolt and Yohan Blake (L) celebrate with their national flag after the men's 100m fi
Jamaica's Usain Bolt crosses the finish line to win gold in the men's 100-meter final (AP)
From right, Trinidad's Richard Thompson, Jamaica's Asafa Powell, United States' Tyson Gay, Jamaica's Yohan Blake, United States' Justin Gatlin, Jamaica's Usain Bolt, United State's Ryan Bailey, and Netherlands' Churandy Martina start in the men's 100-meters final (AP)
Jamaica's Usain Bolt, center, gestures before competing in the men's 100-meter final (AP)