Question: What corporation designed a supersonic light fighter family, initially designed in the late 1950s use in a two-year program that was a joint effort between NASA's Langley Research Center, Dryden Flight Research Center at Edwards Air Force Base, California and Northrop Grumman?

<P0-S0> The Controlled Impact Demonstration (or colloquially the Crash In the Desert) was a joint project between NASA and the Federal Aviation Administration (FAA) aimed at acquiring data, as well as demonstrating and testing new technologies, with the intent of improving occupant crash survivability, by crashing a Boeing 720 aircraft. <P0-S1>  The tests involved the efforts of NASA Ames Research Center, Langley Research Center, Dryden Flight Research Center, the FAA, and General Electric, and required more than 4 years of work before the test occurred. <P0-S2>  The aircraft was remotely controlled for the tests, and numerous test runs were undertaken prior to performing the actual impact. <P0-S3>  The impact test flight occurred on December 1, 1984, proceeding generally according to plan, and resulting in a spectacular fireball which required more than an hour to extinguish. <SEP> <P1-S0> The Northrop HL-10 was one of five American heavyweight lifting body designs flown at NASA's Flight Research Center (FRC—later Dryden Flight Research Center) in Edwards, California, from July 1966 to November 1975 to study and validate the concept of safely maneuvering and landing a low lift-over-drag vehicle designed for reentry from space. <P1-S1>  It was a NASA design and was built to evaluate "inverted airfoil" lifting body and delta planform. <P1-S2>  It currently is on display at the entrance to the Dryden Flight Research Center at Edwards Air Force Base. <SEP> <P2-S0> The NASA Shaped Sonic Boom Demonstration, also known as the Shaped Sonic Boom Experiment, was a two-year program that used a Northrop F-5E with a modified fuselage to demonstrate that the aircraft's shock wave, and accompanying sonic boom, can be shaped, and thereby reduced. <P2-S1>  The program was a joint effort between NASA's Langley Research Center, Dryden Flight Research Center at Edwards Air Force Base, California and Northrop Grumman. <SEP> <P3-S0>  Being smaller and simpler than contemporaries such as the McDonnell Douglas F-4 Phantom II, the F-5 cost less to both procure and operate, making it a popular export aircraft. <P3-S1>  The F-5 started life as a privately funded light fighter program by Northrop in the 1950s. <P3-S2>  The design team wrapped a small, highly aerodynamic fighter around two compact and high-thrust General Electric J85 engines, focusing on performance and low cost of maintenance. <P3-S3> The Northrop F-5A and F-5B Freedom Fighter and the F-5E and F-5F Tiger II are part of a supersonic light fighter family, initially designed in the late 1950s by Northrop Corporation. <P3-S4>  Though primarily designed for the day air superiority role, the aircraft is also a capable ground-attack platform. <P3-S5>  The F-5A entered service in the early 1960s. <P3-S6>  During the Cold War, over 800 were produced through 1972 for U.S. allies. <P3-S7>  Though the USAF had no acknowledged need for a light fighter, it did procure roughly 1,200 Northrop T-38 Talon trainer aircraft, which were directly based on the F-5A.