Which event marked the start of the nuclear arms race? A. Soviet Union's first test of an atomic bomb in 1949. B. United States' first test of a hydrogen bomb in 1952. C. Soviet Union's launching of Sputnik 1 in 1957. D. Cuban Missile Crisis of 1962.
Hello! The event that marks the start of the nuclear race was the first test by Soviet Union, in 1949. After that, the US start to run against the time to compete.
