U.S. swimmer Dana Vollmer set new Olympic and U.S. records in her 100m butterfly qualifying heat this morning. And this afternoon, Michael Phelps and Ryan Lochte will swim in the final of the 400m individual medley.

Good morning. Here's a rundown of what's been happening in and around London, on the morning after the Summer Olympics' opening ceremony:

- U.S. swimmer Dana Vollmer set new Olympic and U.S. records in her 100m butterfly qualifying heat this morning. Vollmer, of Granbury, Texas, had a time of 56.25 seconds. She says she can go faster.

- The first medals have now been awarded in the London 2012 Olympics, with China's Yi Siling winning gold in the 10-meter air rifle shooting competition. Poland took silver, and China took bronze, as well.

- Weightlifter Hysen Pulaku, 20, has been tossed from the games, after testing positive for a forbidden substance. Olympic officials say Pulaku, an Albanian, had stanozolol (a synthetic anabolic steroid) in his system.

- South Korean gold medalist Park Tae-hwan won his 400m freestyle heat — but a judge disqualified him for a false start. His team is protesting. Update at 12:41 p.m. EDT: Park has been reinstated "after a video review," FINA executive director Cornel Marculescu tells the AP.

- Michael Phelps and Ryan Lochte will swim in the final of the 400m individual medley at 2:30 p.m. EDT. Phelps qualified in the eighth, and final, spot.

We'll follow that swimming matchup and other events as they happen. Thanks for joining us today!

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