Correction an Appalachian born yuppie with no technical knowledge claims they could do it. Unless Vance got bored and went through data on the nuclear arsenal then it's probably a safe bet that he's making shit up. Tactical nukes are a thing and backpack nukes are somewhat possible by an army definition of portable, but a nuclear suicide vest is just fucking asanine. Frankly speaking given the general purge of everyone with competency and the general ratfucked nature of these waste of biological matter I wouldn't be surprised to find out that the nuclear arsenal isn't even fully understood anymore because everyone competent was fired or fucked off.