ironman world championships
KAILUA-KONA, HAWAII - OCTOBER 10: Nearly 2,000 competitors enter Kailua Bay for the mass swim start at sunrise during the Ironman World Championships in Kailua-Kona, Hawaii on October 10, 2009. Considered one of the most grueling races in the world, competitors must brave 95 degrees temperature and 90 percent humidity to complete a 3.86 km swim, 180.2 km bike, and a 42.2 km marathon with in an 17 hour time cutoff to be called an "Ironman". (Photo b Donald Miralle Jr)
