Under a steady rain, Pearson barely crossed the line ahead of Harper, who was clocked in 12.37. The U.S. also took the bronze, with Kellie Wells finishing in 12.48.
Lolo Jones, the favorite who fell at the ninth of 10 hurdles four years ago, was fourth Tuesday in 12.58.
It took several seconds for the scoreboard at Olympic Stadium to display the final results, with Pearson and Harper both staring and waiting. When Pearson's named appeared first, she let out a yell, then dropped to her knees and fell on her back.
More Sports Headlines
Snohomish mixed martial artist returns to her first love Mariners beat Twins 4-3 in 11 innings 4:03 p.m. Charles scores 29 points, Liberty beat Storm 78-62 4:49 p.m. Park wins Women's British Open, captures 4th different major 4:38 p.m. Perry wins 2nd straight Champions Tour's 3M Championship 4:33 p.m. Merritt shoots 67 to win Quicken Loans National by 3 shots 4:30 p.m. Triple Crown winner American Pharoah wins $1.75 million Haskell Invitational 4:25 p.m. Bills' Ryan names Incognito starting left guard 4:22 p.m.
Our new comment system is not supported in IE 7. Please upgrade your browser here.