Full coverage: 2016 Rio Olympics

Most Olympic events only require athletes to possess the skills to excel in one sport. But triathlon competitors must be top-notch swimmers, cyclists, and runners. One of the world's best has long been Great Britain's Alistair Brownlee, who became the first competitor to win back-to-back golds in the discipline on Thursday, outdueling his brother Jonathan in a fascinating 1-2 finish. And in the aftermath of their showdown, they discussed the competition with Dan Williams.