What We’re Watching: Felix Chasing Elusive Gold

The marquee track events continue with the American Allyson Felix going for gold in the women’s 200-meter run, and The Times’s Ken Belson explores the intense pin-trading market at Olympic Park.
We’ll be providing daily video updates from London for the duration of the Summer Games. As you watch the video, look for scrolling links to related articles and multimedia at the bottom of the video player. Produced by Jon Huang and Justin Sablich.