Electronics Technician 2nd Class Anthony Juarez assigned to Naval Mobile Construction Battalion (NMCB) 1 , checks an antenna tech manual during a communication systems test at Naval Base Guam July 27, 2017. These tests give NMCB 1 Sailors the opportunity to perform quality assurance checks on their system’s maximum range and communication quality with Port Hueneme, Calif. NMCB 1 provides expeditionary construction and engineering support to expeditionary bases and responds to humanitarian assistance disaster relief requests. (U.S. Navy Combat Camera photo by Fire Controlman 2nd Class Alexander Lee)