business customer demand. We are also investing in our international transoceanic aircraft to enhance our product by featuring full flat bed seats in BusinessElite and in-seat audio and video in all cabins. In addition, we are making investments in our regional aircraft product to create a consistent experience by adding First Class to 70 and 76 seat regional jets.  

     Throughout 2010, we have been acquiring previously owned MD-90 aircraft at significantly lower ownership and total cost relative to comparable new aircraft, and we will seek to acquire additional previously owned MD-90 aircraft in the future. We are also evaluating the future replacement needs for our domestic mainline fleet. If determined necessary, we will seek to acquire previously owned aircraft or place an aircraft order to replace older, less efficient aircraft, such as the DC-9 aircraft. If an aircraft order is placed, we would not expect deliveries of new aircraft to begin earlier than 2013. We have no immediate fleet renewal needs for international aircraft. As previously announced, we continue to substantially reduce our 50-seat regional jet aircraft fleet, retire our DC-9 fleet and eliminate our regional turboprop fleet.  

      JFK Redevelopment. John F. Kennedy International Airport (“JFK”) is one of the world’s busiest airports in one of the most competitive airline markets. We currently operate primarily at Terminal 2 for domestic flights and Terminal 3, which was constructed in 1960, for international flights under leases with the Port Authority of New York and New Jersey (“Port Authority”). We also conduct some flights from Terminal 4, which is operated by JFK International Air Terminal, LLC, a private party, under its lease with the Port Authority.  

     During the December 2010 quarter, we began a redevelopment project that we believe will create a state-of-the-art facility for us at JFK. We estimate this project will cost approximately $1.2 billion and will be completed in stages over five years. This project includes the 

(1) enhancement and expansion of Terminal 4, including the construction of nine new gates; (2) construction of a passenger connector between Terminal 2 and Terminal 4; (3) demolition of the outdated Terminal 3 facilities; and (4) development of the Terminal 3 site for aircraft parking positions. Upon completion of the Terminal 4 expansion, expected to occur in 2013, we will relocate our operations from Terminal 3 to Terminal 4; proceed with demolition activities in Terminal 3; and thereafter conduct coordinated flight operations from Terminals 2 and 4. Once our project is complete, we expect that passengers will benefit from an enhanced customer experience and improved operational performance, including reduced taxi times and better on-time performance. For additional information, see Note 8 of the Notes to the Consolidated Financial Statements.  

Liquidity Events  

     Significant liquidity events during 2010 included the following (see also Note 5 of the Notes to the Consolidated Financial Statements for additional information):  

American Express Agreement . We and American Express modified our agreement under which we