The purpose of this passage is to clarify what a UFO is. The passage tells you that even though UFOs often star in science fiction movies, most UFOs are actually aircraft, kites, clouds, meteors or rocket debris. It also cites a famous case in order to provide evidence for their claim.
American literature<span> is part of the system by which the federal government creates an </span>American identity<span>. </span>
Answer: I need to know the story to help you sorry.
Explanation: