Museum of nuclear technology presents artifacts and documents from very early years of Semipalatinsk nuclear test ground up to its closure. Most of items are very impressive: red button (literally) that started each explosion, high-speed photo camera (100 000 frames per second), tissues of tested animals. The institute of nuclear research was established in Y1943, as soon as it was clear that USA was going to have nuclear bomb. Using all possible means, USSR managed to test the first bomb in Y1949, but for three decades longer USA had been leading nuclear arms race and in the field of long-range delivery. Museum also tells about industrial nuclear explosions, which were numerous.