<Tr> <Th_colspan="2"> Other related appearances </Th> </Tr> <Tr> <Td_colspan="2"> 1906 Intercalated Games </Td> </Tr> <P> The United States of America has sent athletes to every celebration of the modern Olympic Games except the 1980 Summer Olympics, during which it led a boycott . The United States Olympic Committee (USOC) is the National Olympic Committee for the United States . </P> <P> U.S. athletes have won a total of 2,522 medals (1,022 of them gold) at the Summer Olympic Games, the most of any nation, and another 305 at the Winter Olympic Games, the second most behind Norway . The U.S. has topped the gold medal count (as the medals are listed on the IOC website, and internationally by tradition) at seventeen Summer Olympics, the most of any nation, and one Winter Olympics . The U.S. holds the record both for the most gold and overall medals won in a single Summer Olympics . </P>

When did the us not participate in the olympics