Guor Marial is a runner.  He glides around a blue turf oval track. His steps are quick and light.  His back gleams with sweat in the July morning sun. He jokes with his training partner.

“Tired…that’s life man. Yeah, that’s life,” he laughs.

“He doesn’t mind because it is part of the game,” his training partner Fidele Jefferson tells me. “ Tired and keeps going.”

The London 2012 Summer Games are set to begin in earnest, with today's opening ceremony kicking off a weekend of gold-medal competitions. But if you're in America and you hope to watch the Opening Ceremony live, I'm afraid you'll be disappointed: NBC is tape-delaying its broadcast until Friday night.

Spanish Olympians are learning a painful lesson as they suit up for Friday's opening ceremony in London: You get what you pay for.

With Spain on the brink of bankruptcy, its Olympic committee decided to save money this year. It got its Olympic uniforms for free, from the Russian designer Bosco, which also provided kits for the Russian and Ukrainian teams.

Good morning. Today's lone public Olympic event is the Opening Ceremony, which begins at 4 p.m. EDT. NBC will not air the broadcast until the evening, however, at 7:30 p.m. in all time zones. We'll have a post later about that issue, and how you can watch. For now, here's a rundown of news items:

The London Summer Olympics officially begin today with the opening ceremony. Oscar-winning director Danny Boyle of Slumdog Millionaire has put together the latest Olympic kickoff spectacle. As NPR's Philip Reeves reported yesterday, a preview video has been released.

U.S.gymnast McKayla Maroney will compete in the London Summer Games, despite the lingering effects of a broken toe. Maroney, a gold medal contender, is the reigning world champion in the vault. Early reports suggested that Maroney broke her toe in London. But it appears that she merely tweaked an earlier injury.

On Twitter, NBC producer Alexa Ainsworth clarified that Maroney's toe "was broken before Classic and she just aggravated that here."

Courtesy of NAU Athletics Department

The Olympics are just about to get underway, but Lopez Lomong is not in London yet.

He’s returned to Flagstaff in order to finish his training.

Lopez says Flagstaff is the place that made him a world-class athlete, and he’s bringing some of his US teammates with him.

“It’s like I’m still a student here.  I still run the same trails, they’re still the same distances.  That’s why I’m bringing some of my friends, my teammates, the love of what Flagstaff has to offer to the world.”

Kayla Harrison, 22, is the best chance the United States has to win its first Olympic gold medal in the sport of judo. Like many of the world's best athletes, Harrison's road to London wasn't easy.

What To Watch For At The 2012 Olympic Games

Jul 26, 2012

A number of events got started even before the official opening, including men's and women's soccer. Already, the US women's team has claimed its first win. NPR sports correspondent Tom Goldman reports from London with a look at what to watch for at the 2012 Olympic Games.