Monty has been certified as a therapy dog in both the U.S. and the U.K., where he formerly worked as a rat-catcher in a horse barn. Courtesy of Yale University hide caption

itoggle caption Courtesy of Yale University

A view of the Three Mile Island power plant near Harrisburg, Pa., site of the worst nuclear accident in U.S. history. In 1979, a reactor at the plant experienced a partial meltdown, but radioactive material never escaped containment. Bradley Bower/AP Photo hide caption

itoggle caption Bradley Bower/AP Photo

A lake at the the Wind River Range, a mountain range of the Rocky Mountains in western Wyoming. Portions of the range are also inside the Wind River Indian Reservation. summitcheese/Flickr hide caption

itoggle caption summitcheese/Flickr