The U.S. Space & Rocket Center in Huntsville, Alabama is a museum operated by the government of Alabama, showcasing rockets, achievements, and artifacts of the U.S. space program. Sometimes billed as "Earth's largest space museum", astronaut Owen Garriott described the place as, "a great way to learn about space in a town that has embraced the space program from the very beginning." The center opened in 1970, just after the Apollo 12 Moon landing, the second crewed mission to the lunar surface. It showcases Apollo Program hardware and also houses interactive science exhibits, Space Shuttle exhibits, and Army rocketry and aircraft. With more than 1,500 permanent rocketry and space exploration artifacts, as well as many rotating rocketry and space-related exhibits, the center occupies land carved out of Redstone Arsenal adjacent to Huntsville Botanical Garden at exit 15 on Interstate 565. The center offers bus tours of nearby NASA's Marshall Space Flight Center. Two camp programs offer visitors the opportunity to stay on the grounds to learn more about spaceflight and aviation. U.S. Space Camp gives an in-depth exposure to the space program through participant use of simulators, lectures, and training exercises. Aviation Challenge offers a taste of military fighter pilot training, including simulations, lectures, and survival exercises. Both camps provide residential and day camp educational programs for children and adults. Exhibits The U.S. Space & Rocket Center has one of the most extensive collections of space artifacts and displays more than 1500 pieces. Displays include rockets, engines, spacecraft, simulators, and hands-on exhibits. The Space & Rocket Center introduces visitors to U.S. rocketry efforts via both indoor and outdoor displays, from its predecessor at Peenemünde with the German V-1 flying bomb and V-2 rocket, through a progression of U.S. military rockets, such as the Redstone and Jupiter IRBM vehicles, and civilian derivatives such as the Mercury-Redstone and the Juno II, up to the Saturn rocket family civilian rockets, including the vertically displayed Saturn I Block 2 Dynamic Test Vehicle, SA-D5, which has become a famous local landmark, and on to the Space Shuttle. The Saturn V Dynamic Test Vehicle, SA-500D, the only Saturn V of the three on display to have been brought together outside a museum, is displayed overhead in a new building designed specifically for the rocket named Davidson Center for Space Exploration. The , sometimes described as the first manufactured Space Shuttle Orbiter, was a mockup made of