Cheese-obsessed daredevils risk it all in chaotic UK race.

Dozens of participants took part in the annual cheese-rolling race at Cooper's Hill in Gloucester, UK, chasing a 7-pound wheel of Double Gloucester cheese down a near-vertical hill. The first person to cross the finish line gets to keep the cheese. The event, which has been held since at least 1826, is a popular tradition in the UK and attracts hundreds of spectators. Safety concerns are often raised due to the rough and tumble nature of the race, and this year several competitors had to be helped off the course.