I thought the sarcasm tag was unnecessary! You detonate a nuke in the ocean, the radioactivity is in the water (and everywhere else)! As for Las Vegas, people there did get exposed to the radioactivity. Next time I'll put the /s tag!
BTW - I mentioned elsewhere that they're still cleaning up radioactivity on Treasure Island in San Francisco Bay. City "leaders" got the great idea of putting low income housing there after the Navy turned it over to SF. During the late 1940s into the 1950s they detoxed ships used in nuke testing in the Pacific. Well, the Navy supposedly swept up tons of dirt. As of the last couple years, the city is still finding radioactive clumps at doorsteps of housing. The low-income residents filed a multi-billion dollar lawsuit recently. Never should have put housing there. My dad worked at Alameda Naval Air Station in the 1950s and 1960s, and often took me to Treasure Island because of the base there. Beautiful place, but toxic! I didn't know, didn't care.
Next time I’ll put the /s tag!
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Always a good idea /s