The George Bush Intercontinental Airport Terminal Redevelopment Program (ITRP) is the largest capital improvement program in the history of the Houston Airports and consists of three projects: Mickey Leland International Terminal (MLIT), Enabling Utilities Landside (EUL), and Federal Inspection Services (FIS) renovation and expansion projects. The MLIT project is comprised of multiple subphase projects - relief/refresh phase of the gates and gate areas in the existing terminal D area, C-D connector phase (long corridor that connects terminal D to the C-D Knuckle), C-D knuckle phase (renovation to the concessions area where the connectors to terminal C and terminal D meet), new D West Pier (construction of an all new terminal area housing new gates for international flights), and sterile corridor (long corridor that moves passengers from international flights through customs and border protection before allowing them access into the rest of the airport).