Badwater Ultramarathoners test will power in extreme weather

Competitors take part in the Badwater Ultramarathon in Death Valley National Park, California, July 15, 2013. The 135-mile (217 km) race, which bills itself as the world's toughest foot race, goes from Death Valley to Mt. Whitney, California, in temperatures which can reach 130 degrees Fahrenheit (55 Celsius). [Photo/Agencies]