Last seen in:
- Wall Street Journal - Mar 2 2020 - Twisted Threads
- USA Today - Oct 4 2019
- Universal - Jun 9 2019
- New York Times - Jul 22 2018
- The Washington Post - Jan 9 2017
- USA Today - Apr 5 2016
- New York Times - Jan 27 2016
- New York Times - Jul 29 2013
- The Chronicle of Higher Education - May 6 2011
- L.A. Times Daily - Jan 28 2010
Related Clues:
- 'This is only --'
- Blast from the past?
- 'This is ___ ' (radio announcement)
- Event outlawed by intl. treaty
- Treaty topic
- "This is __"
- Underground experiment, for short
- Controversial 50's event
- ''This is only ___''
- "This is only __"
- ''This is only ___!''
- '54 event on Bikini atoll
- Bikini trial
- Explosive '50s trial
- ''This is only __''