Difficulty: if you put 400 kg of 60% U-235 in an airline flight bag, the rest of your day is going to go downhill in a hurry. I'd imagine you'd need at least a

Difficulty: if you put 400 kg of 60% U-235 in an airline flight bag, the rest of your day is going to go downhill in a hurry. I'd imagine you'd need at least a few trucks to move that stuff from point A to point B.