The Soviet Union's K project nuclear test series was a group of 5 nuclear tests conducted in 1961-1962. These tests followed the 1961 Soviet nuclear tests series and preceded the 1962 Soviet nuclear tests series. The K project nuclear testing series were all high altitude tests fired by missiles from the Kapustin Yar launch site in Russia across central Kazakhstan toward the Sary Shagan test range (see map below). Two of the tests were 1.2 kiloton warheads tested in 1961. The remaining three tests were of 300 kiloton warheads in 1962.(See also: List of nuclear weapons tests of the Soviet Union)