The government-run plant was constructed in the 1950s and during time two of its five reactors have been deactivated. The facility which is storing about 36 million gallons (136 million liters) of radioactive liquid in 49 underground tanks. is owned by the US Department of Energy. Bomb sniffing dogs are specially trained. They smell bombs like they smell everything else. They remember signature of explosives previously used during their training. Dogs are better than us at sucking in odors. They have 20 to 40 times more odor receptors in their noses and can smell an odor with fewer molecules of it in the air (even at one-millionth the concentration that humans can). As part of U.S. security, bomb-sniffing dogs work anywhere there might be an explosive.