sentences:  At least three early versions B-17s (2 B-17Ds and early B-17E) were captured by the Japanese in the Philippines and Netherlands East Indies.Planes were tested by the IJAAF Koku Gijutsu Kenkyujo (Air Technical Research Laboratory) at Tachikawa.The B-17s were used during the occupation of Nicaragua against the Sandinista National Liberation Front ("Frente Sandinista de Liberación Nacional")
  
  Força Aérea Portuguesa (Portuguese Air Force) operated five SB-17Gs as search-and-rescue planes from 1947 to 1960.