<human>:  Why did the USA boycott the 1948 Summer Olympics?
<bot>: The USA boycotted the 1948 Summer Olympics because of the Soviet Union’s invasion of the USSR. The USA boycotted the Olympics because the Soviets were not willing to play fair. The USA was concerned that the Soviets would try to use the Olympics to showcase their military power, and that they would try to win gold medals for the USSR.