The paper cited in Riff Raff's post describes it as, "...a real, fully functional, bomb that used lead for the core instead of plutonium." and not a cement dummy. That suggests the Uranium tamper remains. Of course that Uranium is U238, and not itself either explosive or dangerously radioactive. Still, it might make sense to recover the bomb.
Last edited by vaneyck; 9th Nov 2016 at 18:39.