Dan or D.B. Cooper is the alias for a hijacker who is infamous for taking over a commercial plane leaving Portland, Oregon the day before Thanksgiving in 1971. The 40-something-looking man gave the fake name Dan Cooper and, during the flight, told the flight attendant of a bomb in his briefcase. He demanded four parachutes and $200,000 in $20 bills, about $1.2 million in today’s dollars, according to the Encyclopedia Britannica. After the plane landed and let out passengers, they refueled, and Cooper forced the pilots and flight attendant to keep the aircraft flying under 10,000 feet at slower than 200 knots. Then he parachuted out of the plane with the ransom money in hand. No one ever identified, caught, or even heard from him again. And although he used the name Dan Cooper, a reporter misheard this as D.B. Cooper thus starting his false but popular nickname.