Boeing KC-135 Stratotanker
Normally, it is difficult to refuel strategic bombers. Luckily, it is easier for the KC-135 Stratotanker, which saw a lot of action during the Vietnam War. It was an asset to the Americans in the middle of Operation Desert Storm. This was a pioneer in that it was the first jet-powered refueling tanker of the US Air Force.
Boeing KC-135 Stratotanker
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NASA Super Guppy
This aircraft went on to serve as the replacement of the Pregnant Guppy. The NASA Super Guppy is the first aircraft developed by Aero Spacelines. It is not hard to figure out that it was made for cargo. There are two variants of the Super Guppy, and they both came with five planes each. All of them are still in use to this day.
NASA Super Guppy