Related Clues:
- Atlas abbr. before 1991
- Former world power, for short
- The first one went off in 1952
- Warsaw Pact land
- Boycotter of the '84 L.A. Olympics
- It was tested on Bikini, 1954
- Cold War competition
- Khrushchev's concern
- CCCP on 20th-century maps
- SALT signer
- ''Back in the ---'' (Beatles)
- Target of Sakharov's criticism
- Bikini blast
- SALT signatory
- Space race participant