Burr made repeated trips on behalf of the United Service Organizations (USO). He toured both Korea and Vietnam during wartime and once spent six months touring Korea, Japan, and the Philippines. He sometimes organized his own troupe and toured bases both in the U.S. and overseas, often small installations that the USO did not serve, like one tour of Greenland, Baffin Island, Newfoundland and Labrador. Returning from Vietnam in 1965, he made a speaking tour of the U.S. to advocate an intensified war effort. As the war became more controversial, he modified his tone, called for more attention to the sacrifice of the troops, and said, "My only position on the war is that I wish it were over." In October 1967, NBC aired "Raymond Burr Visits Vietnam", a documentary of one of his visits. The reception was mixed. "The impressions he came up with are neither weighty nor particularly revealing", wrote the "Chicago Tribune"; the "Los Angeles Times" called Burr's questions "intelligent and elicited some interesting replies".