It seemed like a stupid question, looking at them. “I got thyroid cancer a few years ago,” one of them said, between bites of his burger. “From the job?” I asked. “I don't know. It was weird. I was 28 years old, in perfect shape. … I parked carefully (I'd read in a divers forum that security booted any car that so much as touched a white line) and made my way to the building that housed the diving team. …… No unusual levels of cancer (except for that attributed to smoking). …

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Swimming On The Hot Side | Popular Science