D.B. Cooper 50 years later

Today marks 50 years since #DBCooper made historic unsolved robbery from a #Boeing727. Here is the #CooperVain that was installed on all 727’s after, so the air stairs cannot be opened in flight. A big thank you to Pima Air and Space for letting us check out #727-22 #N700U #pimaairandspacemuseum #aviationpreservation #boneyardsafari