We're going to get the latest news from our olympics desk in london and abc's bill weir. And, bill, big challenges for team usa up ahead. Absolutely. Big day 12. Top of the morning to all of you here... See More
We're going to get the latest news from our olympics desk in london and abc's bill weir. And, bill, big challenges for team usa up ahead. Absolutely. Big day 12. Top of the morning to all of you here from london. A gorgeous day once again. So many plot twists for the fab five, our fantastic women's gymnastics team. Yesterday, the final day in the gym, where once again, heroes rose and fell. The girl who lit up this gym with a golden grin last week, ended her london run solid. The grind of it all, bringing her back to earth. A similar disappointment for jordyn wieber on the floor exercise. It may have been a stress fractured leg that caused so much frustration for the champ. But both had reason to cheer for teammate aly raisman. Some lovely moves and a low score gave her the broe on the beam. She saved the best for last. She put on a clinic in poise and power, taking floor exercise gold. And leaving this gym with a happy grin. Three americans battle through rain and over hurdles to a drum-tight 100-meter finish. The cameras showed the aussie leading for gold. But dawn harper, kellie wells shrieked for joy when they learned they won silver and bronze. Lolo jones, who rode with so much hype to london, finished fourth. Lucky enough to be in the stadium for that moment. Amazing stuff. Meanwhile, anyone who ever wished they all could be california girls will get their wish in the final of the beach volleyball competition. Misty may-treanor and kerri walsh reached their third-straight olympic final. April ross and jen kesse beat brazil to set up an all-american final in the fan favorite over here. A brutal agony of defeat moment. Superheavyweight german mattias steiner loses his balance and drops a 423-pound barbell on his neck. Paramedics brought out a banner to shield him from public view, just in case they're about to see something truly grisly. But steiner amazingly was fine and walked away waving. And usain bolt is running on the track behind me. A great moment from the 100-meter olympic record. Curtesy of the kids at his school in jamaica. The power was cut seconds before the race was supposed to start. A panic ensued. Someone found a battery-operated radio. And there's the reaction. Lots of joy. In the island, man. And there's a jamaican runner named warren weir. Distant cousins, I guess. I'll be cheering for him later on. Amy? You can go with that. So many highs and lows, bill. Tell your cousin, we said good luck.
This transcript has been automatically generated and may not be 100% accurate.