Staff Sgts. Ralph Nathan, Anthony Roland, and Nathan Knowell assemble VHF and UHF antennas. U.S Air Force Staff Sgts. Ralph Nathan (left), Anthony Roland, and Nathan Knowell (center) assemble VHF and UHF antennas at the Utapao International Airport in Thailand on Jan. 4, 2005. U.S. service men and women are working to deliver humanitarian relief supplies and provide medical assistance to the tsunami-stricken countries as part of Operation Unified Assistance. The Staff Sgts. are Communications Craftsmen with the 615th Air Mobility Squadron. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 473527-N-OJS53-885.jpg Photo Gallery