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https://imageio.forbes.com/specials-images/imageserve/679c60525ddf10441bd2faba/0x0.jpg?format=jpg&crop=2674,1503,x0,y138,safe&height=600&width=1200&fit=boundsSixty-seven people died in a collision between a Bombardier CRJ700 regional jet operated by PSA Airlines and a military Black Hawk helicopter.