Related Clues:
- '50s big blast
- ''This is ___'' (radio broadcast line)
- Historically significant trial
- '50s bomb tryout
- Event in 1940s-'50s headlines
- 1950s trial, briefly
- Big blast of the '50s
- 'This has been ___...'
- Boomer experiment?
- Bikini Atoll event, for short
- Dramatic '50s trial
- ''This is ___ of the emergency ...''
- Alamogordo trial
- __ of strength
- 1954 event code-named Castle Bravo