US Airways Group, Inc. (US Airways Group) is a holding company whose primary business activity is the operation of a network air carrier through its wholly owned subsidiaries, US Airways, Piedmont Airlines, Inc. (Piedmont), PSA Airlines, Inc. (PSA), Material Services Company, Inc. (MSC) and Airways Assurance Limited (AAL). MSC and AAL operate in support of the Company�s airline subsidiaries in areas, such as the procurement of aviation fuel and insurance. It has hubs in Charlotte, Philadelphia and Phoenix and a focus city in Washington, D.C. at Ronald Reagan Washington National Airport (Washington National). During the year ended December 31, 2011, it offered scheduled passenger service on more than 3,100 flights daily to more than 200 communities in the United States, Canada, Mexico, Europe, the Middle East, the Caribbean, and Central and South America. It also has an East Coast route network, including the US Airways Shuttle service.