for restoration. LaGuardia's general manager at the time called it the "crown jewel of the airport". Delta added a business center to the terminal in 2006. The Port Authority voted to install vehicular bollards in front of the terminal in 2007 due to security concerns following the September 11 attacks. In 2009, it was announced as part of a slot-swap transaction that Delta Air Lines would relocate to LaGuardia's Central Terminal, while US Airways would start operating its US Airways Shuttle out of the Marine Air Terminal. The swap would have allowed Delta to operate hourly flights between LaGuardia and O'Hare International Airport. The proposed swap between US Airways and Delta never took place. Delta Shuttle continued to operate from the Marine Air Terminal until December 8, 2017. Meanwhile, in 2010, the New York City Taxi and Limousine Commission introduced a pilot program that allowed Delta Shuttle passengers to share a taxicab between the Marine Air Terminal and Manhattan, but this program was unpopular. LaGuardia redevelopment In 2015, New York governor Andrew Cuomo and then-vice president Joe Biden announced a $4 billion plan to rebuild most of LaGuardia's terminals as one contiguous building. The Marine Air Terminal was preserved as part of the plan because it was an official landmark. On December 9, 2017, as part of the LaGuardia redevelopment, Delta Air Lines ceased shuttle operations out of the Marine Air Terminal, moving back to Terminal C. Alaska Airlines and JetBlue relocated their operations from Terminal B to the Marine Air Terminal. Alaska Airlines ended all service from LaGuardia Airport on October 27, 2018. JetBlue used the Marine Air Terminal for flights to Boston, Orlando, Fort Lauderdale, and West Palm Beach. The airline renovated the terminal as part of a project completed in early 2019. On April 28, 2021, Spirit Airlines started service in the Marine Air Terminal for its flights to Fort Lauderdale, although the airline's other destinations were still located in Terminal C. Spirit moved its remaining LaGuardia services to the Marine Air Terminal the following March. JetBlue moved all operations to Terminal B on July 9, 2022, after having previously split its operations between Terminal B and the Marine Air Terminal. Main building The Marine Air Terminal, also known as Terminal A, is at the western end of LaGuardia Airport in Queens, New York City, along the southern shore of Bowery Bay. The terminal was designed in