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.