World’s Strangest Unsolved Mysteries 1. The Strange Disappearance of D.B. Cooper On Wednesday, Nov. 24, 1971, a man identified as Daniel Cooper bought a $20 one-way ticket on Northwest Airlines, Flight 305 from Portland, Oregon, to Seattle, Washington. Cooper was described as being in his mid-40s, wearing a business suit, an overcoat, brown shoes, a white shirt and a black tie. He also carried a briefcase and a brown paper bag. Before the flight took off, he ordered a bourbon and soda from a flight attendant. After the plane was airborne, Cooper handed the flight attendant a note. At first, she just put it in her pocket without looking at it, but then Cooper told her, “Miss, you better look at that note. I have a bomb.” Cooper then told her the bomb was in his briefcase and asked her to sit next to him. He opened the briefcase to reveal red-colored sticks, surrounded by an array of wires. Cooper told the flight attendant to write down everything he said and then take it to the Ca...