For the second straight major championship, Morgan Uceny of the U.S. was sent sprawling to the track in a 1500m final, proving once again that sit-and-kick strategy carries greater risk than reward.

Track and field athlete Bryshon Nellum will carry the flag for the 529-member American team when they march into the stadium Friday night for the Opening Ceremony.

With two nights of competition left in Olympic Stadium, the relays finally get started. The women’s 4x400m and men’s 4x100m will be events not to be missed tonight, along with the women’s 1500m.

In a little over a month, Ashton Eaton has broken the world record in the decathlon and now become the 12 American Olympic champion in the event, yet so naive about his greatness.

Ashton Eaton became the twelfth American man to win decathlon gold Thursday night, joining an impressive list of boyhood heroes who defied physics and their own bodies to wear the title of "world's greatest athlete."

With his third career world record earning him his first 800m gold medal, an argument can now be made that Kenya's David Rudisha, not Jamaica's Usain Bolt, is the most dominant athlete in track and field.

And the hits just keep on coming. An already depleted American 4x400 team took another hit Thursday afternoon when Manteo Mitchell allegedly broke his leg with 200m left during his turn around the track.

With the U.S. down its two biggest stars, LaShawn Merrit and Jeremy Wariner, the future is now for a group of first time Olympians who have been entrusted with extending American dominance in the 4x400m.

Usain Bolt takes to the track for his second final of the London Olympics, the men's 200m, as Kenya's David Rudisha chases his first gold medal in the men's 800m tonight at Olympic Stadium.

Jeremy Wariner, a stalwart on two Olympic gold-medal-winning 4x400m relays, has been ruled out of competing in the event in London due to a torn hamstring.