All the best science comes from TV shows, right? I just watched an ep of "Timeless", a new series about time travelling hijinks. In this ep, they want back to the Nevada bomb tests of 1962 and stole a plutonium core of what looked like the Fat Man atomic bomb. They brazenly took the ~4 inch sphere "pit" out of its shielded case and carried it around - in nothing but their street clothes and lead-lined gloves. No one (even our intrepid 21st century travellers) seemed the least bit fazed. How sick would they be after, say, a one minute exposure at a distance of 3 feet?