Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Boeing KC-135 Stratotanker:

"
  • 58-0070 – KC-135A on static display at the Wings of Freedom Park at Altus Air Force Base, Oklahoma.[17]
  • 59-1481 – KC-135A on static display at Ellington Field Joint Reserve Base, Texas. It was operated by NASA as N930NA and one of two KC-135s used for zero-gravity and other research purposes.[citation needed]
  • 59-1487 – KC-135E on static display at the 126th Air Refueling Wing / Illinois Air National Guard complex at Scott Air Force Base.[18][19]