rocket motors that built upon research conducted into the German V-2 Rocket after World War II. Rocketdyne would become a major supplier for NASA, producing the Rocketdyne F-1 engine for the Saturn V rocket of the Apollo Space Program as well as the RS-25 engine of the Space Shuttle program and its successor the Space Launch System (SLS) program. Together, Aerojet Rocketdyne has gone on to contribute to every successful NASA Mars mission, including powering the launch, entry, descent, and landing phases of the Perseverance rover mission. Name change In 1984, General Tire created a parent holding company, GenCorp, for its various businesses. The main subsidiaries were: General Tire and Rubber; RKO General, the broadcast arm of the conglomerate; DiversiTech General, a manufacturer of tennis balls and polymer products, including automotive soundproofing and home wallpapers; and Aerojet General, a defense (missile) contractor. Through its RKO General subsidiary, the company also held stakes in: Frontier Airlines; RKO bottlers, which operated Pepsi-Cola distributorships; and several resorts and hotels, including the Westward Look resort in Tucson, Arizona. Disconglomeration Faced with a hostile takeover attempt, among other difficulties, GenCorp shed some of its long-held units in the late 1980s. RKO General ran into difficulties with the Federal Communications Commission (FCC) during license renewal proceedings in the late 1980s. The FCC was reluctant to renew the broadcast licenses, due to widespread lying to advertisers and regulators. As a result of the protracted proceedings, GenCorp sold RKO General's broadcast properties beginning in 1987. GenCorp also sold its former flagship, General Tire, to German tire maker Continental AG in order to concentrate on Aerojet. In 1999, GenCorp spun off its Decorative & Building Products and Performance Chemicals businesses. GenCorp formed OMNOVA Solutions, Inc. into a separate, publicly traded company, and transferred those businesses into it. GenCorp's two remaining businesses, as of 2008, are Aerojet and real estate. Aeronautics expansion In July 2012, GenCorp agreed to buy rocket engine producer Pratt & Whitney Rocketdyne from United Technologies Corporation for $550 million. The FTC approved the deal on June 10, 2013, and it closed on June 17. Abandoned acquisition by Lockheed Martin On December 20, 2020, it was announced that Lockheed Martin would acquire the company for $4.4 billion. The acquisition was expected to close in first quarter of 2022, however this received opposition from Raytheon Technologies, later the FTC sued to block this deal on a 4-0 vote