Original sentence: Airforce defended themselves by citing internal investigations which could not explain all phenonema related to UFO-sightings, but allegedly did not produce sufficient evidence for the speculation that UFOs are alien spacecraft.On the one hand self-proclaimed skeptics demanded that the allegedly withheld alien artifacts must be shown and single persons within the government be named prior to an investigation, on the other hand spokespeople for the U.Other demands are the immediate stop of the weaponization of space and the international cooperation in all space-related issues
Edited sentence: Airforce who claim that there is no convincing evidence for the speculation that UFOs are alien spacecraft.Such arguments were met with by derision by skeptics and spokespeople for the U