"CAPTIVE BALLOON SUPPORTS 'VOICE OF AMERICA' ANTENNA - Here Coast Guardsmen are removing the restraining net from the balloon prior to sending it aloft. The fins are not yet inflated, as they will automatically fill with air as the balloon rises, through a wind tunnel which runs the length of the balloon from the nose to the fins. This photo series was made on March 7-8, 1952, during a test cruise of the USCGC COURIER (WAGR-410), sea-going radio broadcasting station for the 'Voice of America' engineers to supervise operation of the transmitting equipment. CREDIT -- U.S. COAST GUARD OFFICIAL PHOTO"; (#5538 - #6 of 9).