My father recounted the following sighting to me in the 1960s, 1970s & 1980s.He recalled that he was a day laborer on the Conemaugh-Blacklick Railroad working with a sledgehammer on the track.
He had been on the job for several days on a crew of dozens to perhaps a hundred or more workers.
It was a Sunny, cloudless day with a deep blue sky.
He guessed that it was mid morning to mid afternoon.
Someone said something like Oh look.
He looked up and saw a gigantic silver disk traveling at an incredible speed, people gasped in awe.
After reaching a point in the sky, it came an immediate halt, hovered for many seconds to maybe a minute, then dropped a mile or so, hovered, shot across the sky, hovered, then disappeared.
It made no sound and left no vapor trail.
It had no ornamentation, but was a clean disk.
Dad had never seen a UFO before and did not believe in them, nor was he a particularly religious or superstitious person.
He had been discharged from the Navy in December 1949, where he had driven a landing craft since 1944.
He said he had been trained to judge size and distance and had used antiaircraft guns in some of his engagements in the South Pacific, as well as his ship's 14" to 16" guns as a fill in.
He estimated this UFO was about the size of 4 football fields, and traveled at speeds exceeding any aircraft he had ever see, which included some of the early jets.
Only a missile well into its flight might have equaled it, but it stopped on a dime.
The next day, he came to work and was told he was no longer needed.
He had not checked to see if it was reported by the local media and had not gotten acquainted with anyone, but he did recall talking about it with someone who worked next to him.
Later, he did see the movie, The Day The Earth Stood Still, and remarked that it looked a lot like that craft, but he said it was much larger.