Beginning in 1971, AFVN began to close some stations in Vietnam. The last station to close was the key station in Saigon in 1973. Broadcasting continued under civilian leadership on FM only and using the name American Radio Service (ARS). The civilian engineers were provided by Pacific Architects and Engineers (PAE). ARS stayed on the air until the Fall of Saigon in April 1975. It was to play Bing Crosby's version of Irving Berlin's "White Christmas" as a signal for Americans that the final evacuation of Saigon had begun. The Crosby version of the record could not be found so Tennessee Ernie Ford's record was played.