FEED: Four Types: A Look At The Aerial Refueling Tankers Of The USAF

In its massive fleet, the United States Air Force (USAF) currently operates four types of tanker aircraft for air-to-air refueling. Before we look at these four aircraft in-depth, let's first look at why the ability to refuel aircraft in the air is essential, how it is done, and how it has evolved over the years.