Meb Keflezighi and Galen Rupp lead the race during the U.S Olympic Marathon Team Trials in February in Los Angeles. Jonathan Moore/Getty Images hide caption
London Olympics
Boxer Claressa Shields, shown here in November 2015, wants to follow in Muhammad Ali's footsteps. Harry How/Getty Images hide caption
For Olympic Boxer Claressa Shields, Round 2 Brings New Expectations
New analysis of stored samples taken from athletes at the Beijing and London Summer Olympics has turned up 45 cases of banned substances. Here, urine samples are recorded upon arriving at the China Anti-Doping Agency in Beijing in 2008. Robert F. Bukaty/AP hide caption
Referee Torsten Berg tried to get players from Indonesia (near court) and South Korea to try their hardest during this match at the London Olympics. The format gave some teams an incentive to lose — in order to get easier opponents in upcoming matches. That format's being changed. Adek Berry /AFP/Getty Images hide caption
A team of torchbearers brings the Paralympic flame through Piccadilly Circus as the torch heads across London to the Olympic Stadium. The Paralympic Games' opening ceremony will be held Wednesday at 3:30 p.m. ET. LOCOG/Getty Images hide caption
Germany's Laura Ludwing wears Kinesio tape during a women's beach volleyball match on July 31, 2012, during the London 2012 Olympic Games. Daniel Garcia/AFP/Getty Images hide caption
The Olympic Flame as it passed through London on Thursday. Andrew Cowie/AFP/Getty Images hide caption
Spain's Rafael Nadal looks on during his Wimbledon loss to Czech Republic's Lukas Rosol in June. Miguel Medina /AFP/Getty Images hide caption
In this May photo, members of a Saudi female soccer team listen to their captain, Rawh Abdullah, before their training session at a secret location in Riyadh. The decision to send female athletes to the Olympics will definitely have consequences at home. Hassan Ammar/AP hide caption
Michael Phelps reacts after winning the men's 200m Butterfly semifinal on day six of the 2012 U.S. Olympic Team Trials on Saturday. Frederic J. Brown /AFP/Getty Images hide caption