The IOC opened an investigation Thursday into Lance Armstrong's role in a doping scandal that has already wiped out his seven Tour de France titles and could cost him his Olympic bronze medal.
The Jacarepagua track has hosted its last auto racing event before the site is redeveloped to make room for the 2016 Olympic Park.
Amateur boxing's international governing body on Thursday lifted the three-month suspension of USA Boxing that was imposed over its response to several controversial statements by its former president.
IOC President Jacques Rogge defended the international cycling union's anti-doping efforts Wednesday and said it would be wrong to kick the sport out of the Olympics in the wake of the Lance Armstrong scandal.
Olympic star Missy Franklin has verbally committed to attend the University of California, ending the pursuit of one of the most sought after swimming recruits.
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