Boeing will continue assuring the worldwide availability of C-17 aircraft, which provide vital military and humanitarian airlift capability, through a $2 bn follow-on contract it recently received from the U.S. Department of Defense. The C-17 Globemaster III Integrated Sustainment Program (GISP) provides support services such as forecasting, purchasing and material management for the C-17 and all C-17-unique support. This Performance-Based Logistics (PBL) program, which started in 1998 with 42 aircraft, now covers 246 worldwide. It provides lower costs through economies of scale from supporting the entire global fleet. The latest contract covers fiscal years 2013 through 2017.