2012 Summer Olympics begins

LONDON -- The 2012 Summer Olympics are officially underway in London.

"I'm still like, 'Is this real? Like, am I really here?'" said Abby Johnston of the Olympic Team.

"I'm ecstatic, I'm really excited just to see the performers and the show," said Jamel Herring, another U.S. Olympian.

The opening ceremonies are going on right now. The Parade of Nations featured over 10,000 athletes.

The big question on everyone's minds: Who is going to light the Olympic cauldron?

Michelle Obama visited with the entire U.S. Olympic Team. The First Lady said she is thrilled to be in London to cheer the athletes on.

"This only happens every few years so, try to have fun, try to breathe a little bit, but also win, right? In the end, winning is good," said Michelle Obama.

Big Ben (or Elizabeth Tower) welcomed the athletes Friday morning, by ringing 40 times.

The Olympic flame also made its way down the River Thames, marking an end to its 70-day, 8,000-mile journey.