The United States Air Force continues to operate old (very old) aircraft designs that trace their origins to the early Cold War. These are mostly larger transport/tanker/bomber-style aircraft ( fighter jets tend to be newer), and while some will retire, there is no end in sight for others. Missing from this list are aircraft like the iconic U-2 Dragon Lady spy plane as it is soon to retire. Incredibly, there may even be a few WWII-era aircraft still operating around the world.