Joint Base Andrews is a military installation located in Prince George's County, Maryland. It serves as a key base for the United States Air Force and is known for housing the Air Force One aircraft, which is used to transport the President of the United States. The base plays a vital role in supporting various military operations and missions. Originally established during World War II, Joint Base Andrews has evolved over the years and now combines the functions of several military branches. It provides essential services, training, and facilities for both active-duty personnel and their families, contributing to national defense and readiness.