[tgjsrkghruksd]

Puffing a cigar is little different from puffing a pipe. If you're inhaling into your lungs, you are doing it wrong. In either case, you are pulling tobacco smoke into your mouth and throat and related cavities. Risk of cancers of the throat, mouth, tongue, etc. are all greatly increased. It's not as bad as a cigarette habit, but far from harmless.

The fellow in this video lighting a cigar was probably getting more cancer exposure from the cigar than any radiation from the bomb test.

It probably wouldn't be done this way today (though, it wouldn't shock me, with a novel new weapon), but the guys in this video were never in any real risk. Building those planes and bombs took some damn good scientists. They knew a thing or two about radiation exposure. Certainly more than was known at the time about tobacco exposure.