of Textron Aviation. The product line of Raytheon's aircraft subsidiary included business jets such as the Hawker 800XP and Hawker 4000, the Beechjet 400A, and the Premier I; the popular King Air series of twin turboprops; and piston-engine aircraft such as the Bonanza. Its special-mission aircraft included the single-turboprop T-6A Texan II, which the United States Air Force and United States Navy had chosen as their primary training aircraft. 1990s In 1991, during the Persian Gulf War, Raytheon's Patriot missile received great international exposure, resulting in a substantial increase in sales for the company outside the United States. In an effort to establish leadership in the defense electronics business, Raytheon purchased in quick succession Dallas-based E-Systems (1995); Chrysler Corporation's defense electronics and aircraft-modification businesses, which had previously acquired companies such as Electrospace systems (1996) (portions of these businesses were later sold to L-3 Communications), and the defense unit of Texas Instruments, Defense Systems & Electronics Group (1997). Also in 1997, Raytheon acquired the aerospace and defense business of Hughes Aircraft Company from Hughes Electronics Corporation, a subsidiary of General Motors, which included a number of product lines previously purchased by Hughes Electronics, including the former General Dynamics missile business (Pomona facility), the defense portion of Delco Electronics (Delco Systems Operations), and Magnavox Electronic Systems. Raytheon also divested itself of several nondefense businesses in the 1990s, including Amana Refrigeration, Raytheon Commercial Laundry (purchased by Bain Capital's Alliance Laundry Systems), and Seismograph Service Ltd (sold to Schlumberger-Geco-Prakla). On October 12, 1999, Raytheon exited the personal rapid transit (PRT) business as it terminated its PRT 2000 system due to the high cost of development and the lack of interest. 2000s In November 2007, Raytheon purchased Sarcos for an undisclosed sum, seeking to expand into robotics research and production. In September 2009, Raytheon entered into an agreement to acquire BBN Technologies. The acquisition was completed on October 29, 2009. 2010s In December 2010, Applied Signal Technology agreed to be acquired by Raytheon for $490 million. In October 2014, Raytheon beat rivals Lockheed Martin and Northrop Grumman for a contract to build 3DELRR, a next-generation long-range radar system, for the US Air Force worth an estimated $1 billion. The contract award was immediately protested by Raytheon's competitors, Lockheed Martin and Northrop Grumman. After re-evaluating the bids following the protests, the US Air Force decided to delay awarding the 3DELRR EMD contract until 2017 and was