West Coast Airlines Flight 956 was a brand-new DC-9; the airline literally bought it on Monday and crashed it on Saturday. It hit a mountain while flying calmly along, 5,000 feet too low. But, no one has been able to figure out why. (Welches, Clackamas County; 1960s) (For text and pictures, see https://offbeatoregon.com/1712c.oregons-worst-plane-crash-mystery-474.html)