Book IX Print 19: Attempted landing of United States Piper Apache aircraft on secret mission to CubaYale University. Department of Manuscripts and Archives1960 MayengspaThis folder encloses both a contact sheet and an empty envelope for holding negatives with a typed descriptive text. As confirmed by this text, images in the contact sheet show the aborted attempted landing of a U.S.-based Piper Apache aircraft, flown by Matthew Edward Duke, on a secret mission to Cuba in order to facilitate the escape of four former officials of the Batista regime who were probably facing trial and possible execution in Cuba for war crimes. According to St. George's notes typed on envelope enclosed, the crash took place on May 12, 1960.