On Friday, the U.S. ambassador to Serbia visited the village of Pranjani to honor Serbian families who saved the lives of hundreds of U.S. airmen shot down by Nazi forces during World War II. This year marks the 63rd anniversary of the Halyard rescue mission. Here is the text from the embassy's website explaining more about this rescue mission: "During the summer of 1944 approximately 1, 000 U.S. airmen bailed out over German-occupied Yugoslavia, a significant number of them landing in Serbia. In a series of daylight and night airlifts, a team made up of troops of General Mihailovic's Royal Yugoslav Army in the Homeland and the Office of Strategic Services (O.S.S.) evacuated over 300 U.S. airmen from the village of Pranjani. The rescue of the U.S. airmen involved small unit actions against German troops and put at risk entire Serb villages that sheltered the U.S. personnel. U.S. airmen bear testimony to the significant sacrifices of local Serb villagers who fed, cared for and protected them, in some cases up to six months. The Halyard Mission is considered one of the greatest rescues of American airmen from behind enemy lines in the history of warfare."