It happened from 1945 , begining of the cold war until 1969
1945 : USA test and drops the first atomicbombs (bombA)
1949 : the USSR test Abomb
1952 : USA test its first hydrogenbomb ( H bomb)
1953 : The USSR test its first H bomb
1957 : USSR tests an Intercontinental Ballistic Missile (ICBM) capable of carrying an H bomb from the USSR to the USA
1957 : The USSR put the space satelite , Sputnik , into orbit
1957 : The USSr put dog , Laika into space in SputnikII
1958 : The USA places Intermediate Range Ballistic Missiles (IRBMs)targetted on the USSR in NATO countries . Both sides are now capable of direct attack on each other cities
1958 : The USA launches its own satelite , Explorer 1
1958 : The USA set up National Aeronautics and Space Administration ( NASA ) to run civillian space programme
1960 : The Usa launches first nuclear-powered submarien capable of firing Polaris missile with atomic warhead from underwater
1961 : The USSR put the first human , Yuri Gagarin , into space
1962 : The USA put first american into space , JohnGlenn
1969 : The USA land the first human on the moon from Apollo II space craft . NeilAmstrong becomes the first person to walk on the moon
