I really enjoyed my visit to this museum. Not only was it full of fascinating facts about the testing and the many scientist that contributed to making Fat Man and Little Boy, but there was a simulated blast! I would have liked to see more facts from both sides of the war at this point in time - Hiroshima and Nagasaki could have had more coverage. The Marshall Islands could have been covered more. There were so many videos and artifacts stuffed into this museum you could easily spend a few hours there.
The simulated atomic blast was thrilling. I mean, I was actually terrified for a few minutes. I know it was a mere simulation, however it was wonderfully done. You walk into a fall our shelter, theater. The doors close behind you automatically when the show begins. The countdown begins, and well...I won't ruin the rest. I loved it! I would go again.
The bonus of this side trip was there was a large exhibit of Communist propaganda art from the Russian's POV of the Cold War era. It was an interesting contrast to the rest of the museum. I would recommend this side trip in Las Vegas to anyone wanting to get away from the ever-running slot machine noise.