C17, also known as the C-17 Globemaster III, is a large military transport aircraft developed by McDonnell Douglas for the United States Air Force. It is designed to carry oversized cargo, including military equipment and humanitarian supplies, and can operate from short and unpaved airstrips. The C17 features advanced avionics and a unique cargo handling system, allowing it to load and unload cargo quickly. It can accommodate various types of cargo, including helicopters and large vehicles, making it a versatile asset for military and disaster relief operations worldwide.