During this phase of mergers and acquisitions, the AAS program ran into troubles due to a variety of large scale integration and requirements issues. The program was canceled and restarted twice, first in 1994 and later in 1996. The program was eventually canceled by the FAA at Lockheed Martin's request. Parts of the AAS system were spun off into the much more successful Display System Replacement (DSR) and HOST Replacement programs in 1998 and 1999. LMATM also built the New En Route Centre (NERC) in 1998 and Air Traffic Control centers in Taiwan, Argentina, and South Korea.