Lockheed Martin SR-72 have the same range, with entry into service by 2030. The SR-72 follows the US Air Force's hypersonic road map for developing a hypersonic strike weapon by 2020, and a penetrating ISR aircraft by 2030. At the time of the concept's unveiling, Lockheed Martin had engaged in talks with government officials, but has not secured funding for the demonstrator or engine. On 13 November 2013, Air Force Chief of Staff General Mark Welsh revealed that the service was interested in the SR-72's hypersonic capabilities, but had not spoken with Lockheed Martin about the aircraft. Its high speed appeals to the
General Dynamics 1993, which was one of the Western world's most-produced jet fighters. Production was sold to Lockheed Martin, but GD re-entered the airframe business in 1999 with its purchase of Gulfstream Aerospace. General Dynamics traces its ancestry to John Philip Holland's Holland Torpedo Boat Company. This company was responsible for developing the U.S. Navy's first modern submarines, built at Lewis Nixon's Crescent Shipyard in Elizabethport, New Jersey. The revolutionary submarine boat "Holland VI" was built there, its keel being laid down in 1896. Crescent's superintendent and naval architect Arthur Leopold Busch supervised the construction of this submarine, which was launched on