London Olympics | Men’s 100-meter race

Jamaica’s Usain Bolt, left, wins his qualifying heat of the 100- meter race. (Wally Skalij / Los Angeles Times)

Aug. 4, 2012 10:08 AM PT

Usain Bolt and three Americans, Justin Gatlin, Tyson Gay and Ryan Bailey, are among those qualifying for the next round.

Usain Bolt of Jamaica and James Dasaolu of Great Britain compete in a men’s 100m round one heat. Bolt finished first in his heat and will move on to the next round. Dasaolu also qualified. (Michael Steele / Getty Images)

Ryan Bailey of the United States, left, wins his 100m heat. (John G. Mabanglo / EPA)

Rondel Sorrillo of Trinidad and Tobago, Justin Gatlin of the United States and Barakat Mubarak Al-Harthi of Oman, from left, race in a men’s 100m heat. Gatlin and Sorrillo qualified for the next round of competition. (Michael Steele / Getty Images)

Justin Gatlin of the United States salutes after qualifying in his heat of the men’s 100-meter race. (Lee Jin-man / Associated Press)

Tyson Gay of the United States prepares for his 100-meter heat. He won to qualify for the next round. (Matt Slocum / Associated Press)

Tyson Gay of the United States qualifies for next round of 100m race. (Adrian Dennis / AFP / Getty Images)