During the Cold War, the U.S. Naval Research Laboratory designed and built several satellites such as LOFTI-1. This antenna-and-sensor-covered sphere was launched with the Transit 3B navigation satellite aboard a Thor-Ablestar rocket on February 22, 1961 to investigate the possibility of communicating with submarines at sea using very low frequency radio signals beamed to and from the ionosphere. LOFTI-1's orbit decayed in about a month, destroying the satellite ahead of schedule, but not before it had shown the U.S. Navy that satellite-submarine VLF communication would not work well. This replica of LOFTI-1 at the Smithsonian National Air and Space Museum's Steven F. Udvar-Hazy Center (Chantilly, Virginia) resembles another U.S. Navy satellite launched around the same time, the secret Galactic Radiation and Background (GRAB) spy satellites that carried equipment for the Solrad science experiment and Project Dyno's Tattletale reconnaissance program. The satellite also resembles one of the droids from the Star Wars series, such as the training remote or some kind of Imperial probe.