And thankfully is deadly dangerous to handle. A half-hour of exposure will give you enough rads to kill you, and make you glow like a strobe-light to satellites. Without regular maintenance, bombs using HEU as an explosive break down. Without the proper protection gear and equipment, any technician trying to do the routine maintenance will die.
That isn't true. It is actually less radioactive than plutonium. And plutonium can be worked with without special shielding:
During the Manhattan project the core of the "Gadget" (plutonium) was transported to the Trinity Site in the back seat of a car by a physicist who held it in his lap.