terminal to the new concourses. In 2001 the new Midway Airport terminal building opened, with larger ticket counters, spacious baggage claim areas, traveler information, and a short walking distance to gates. A food court opened with Chicago-style food and retail options. The expansion project culminated with a short lived period of great airline diversity at Midway as Vanguard Airlines, National Airlines and AirTran Airways all expanded their services to the airport. ATA Airlines (ATA) took over Chicago Express Airlines, also known as ATA Connection, whose primary hub was at Midway. Chicago Express served as a regional airline connecting to airports around the Great Lakes regions. Following the September 11 attacks, which resulted in a drop in passenger service, along with other problems for the airline industry, both Vanguard and National ceased operations at Midway and became defunct in 2002, with MetroJet being dissolved and refolded into US Airways' main line in late 2001. In 2002 Midway welcomed the return of international service after a 40-year absence with the opening of the new Federal Inspection Service facility in Concourse A. In June 2004, Mayor Daley and airline officials celebrated the completion of the Terminal Development Program. The project, designed by HNTB resulted in the addition of 14 gates (from 29 to 43). A new 6,300-space economy parking garage, including a new bridge and roadway for buses shuttling passengers to and from the terminal, opened in December 2005. Simultaneous to Midway's expansion, ATA Airlines began rapid expansion at Midway in the early 2000s (decade), and was the airport's dominant carrier prior to 2004, using 14 of the 17 gates in Concourse A. However, after the airline declared bankruptcy in October 2004, scheduled service from Midway significantly decreased. For over 16 years, Midway had been the main hub for Indianapolis-based ATA, but the airline shut down on June 7, 2008. Earlier, the airline filed for bankruptcy in April 2008; on April 3, 2008, ATA Airlines discontinued all operations. In November 2008, Porter Airlines, which flies between Midway and Billy Bishop Toronto City Airport, was the only international route served from Chicago–Midway after ATA Airlines, which had flights to Mexico, ceased operations in April that year. On December 13, 2010, a second carrier, Volaris, began flights between Guadalajara and Midway. Starting in early 2009, a construction project added a new walkway and food court to Concourse A. The project also connected gates A4A and