This is the cbs evening news with scott pelley. Pelley confidential medical tests of american olympians were published online today after being stolen from the files of the world antidoping agency. The agency, known as wada, says the hackers were in russia, which had seen many of its athletes banned for doping. Margaret brennan is following this. Reporter fourtime olympic golded s williams were among those whose medical files were hacked. Their confidential records werel posted online by a team of hackers calling themselvesem fancy bears, also known as tsar team. The hackers claim dozens of american sleets tested positive for doping and that these medalists in rio, regularly used illicit strong drugs, like amphetamines andcit psychostimulants in order to win. But that was quickly dismissed t agency, which said the athletes had been granted a medical exemption to take the drugs in each case. Venus williams said she was one of the strongest supporters of integrity in competitive sports a