I think "fabricate" may be too strong a word. The human mind--and human memory--is a funny thing. Especially remembering things from high-stress situations (like we all experienced on and after 9/11).
It's the reason why, if you interview ten eyewitnesses to a crime, you will get ten different stories. And if you interview the same eyewitnesses ten years later, you'll get another ten different stories. It's not that the witnesses are lying, it's that humans are imperfect, and we remember things imperfectly.
My memory is excellent and Trump IS correct!