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Men's 100-Meter Dash
The 100-meter sprint always draws intrigue, but this year's version has an extra kick.
American record-holder Tyson Gay is fighting his way back from injury in hopes of making a second straight Olympic team. Walter Dix, a 2008 bronze medalist in the 100 and 200, is back for another go 'round. And then there's Justin Gatlin, the 2004 Olympic champion who has returned from a four-year doping ban at age 30 to post the best American time of the season.
Each veteran harbors legitimate medal hopes, but only one will emerge as Team USA's best bet to beat the Jamaicans in London.
Women's 200-Meter Dash
This field is absolutely loaded, starting with two-time 200-meter silver medalist Allyson Felix. Felix has made no secret of her desire to win this event, even dropping the 400 in order to channel her energy toward the 200 triumph.
She'll get a stiff challenge from Carmelita Jeter, the 100-meter specialist who surprised most observers by beating Felix in the 200 at 2011 Worlds.
But neither woman has the season's best time. That honor belongs to red-hot Sanya Richards-Ross, who is after an ambitious 200-400 double and seems to be peaking.
Men's 5,000-Meter Run
Distance legend Bernard Lagat has moved up from the 1,500 in search of his fourth Olympic appearance and second as a naturalized American citizen.
Lagat has the closing speed to spare, but 10,000-meter maven Galen Rupp will give him all he can handle at the top of the race.
If either should falter, Sudanese refugee and 2008 flag-bearer Lopez Lomong waits in the wings.
Women's 100-Meter Hurdles
Hurdling beauty Lolo Jones is no lock to make the Olympic team, with strong contenders like Dawn Harper, Kellie Wells, Kristi Castlin and Danielle Carruthers all in the mix for Team USA's three slots.
Combine fierce competition with the treachery of wooden barriers, and you've got the potential for one heck of an event final.
This could be America's best decathlon team ever, but each of Team USA's top three contenders has a potentially fatal flaw.
Defending Olympic champion Bryan Clay is on the mend from injury and hasn't completed a full decathlon since 2010. Two-time defending world champion Trey Hardee had Tommy John surgery less than a year ago and will be severely handicapped in the throwing events.
Rising prodigy Ashton Eaton is the healthiest of the three, but youth could prove his undoing.
If each rises to the occasion, America could be set for its first decathlon podium sweep since 1952.