Marines assigned to the 3rd Battalion, 4th Marine Regiment, 1st Marine Division test a Tethered Unmanned Aerial Vehicle during Advanced Naval Technology Exercise 2018 at Marine Corps Base Camp Pendleton, Calif., March 21, 2018. The Marines are testing next-generation technologies to assess the operational utility of emerging technologies and engineering innovations that improve Marines’ survivability, lethality and connectivity in complex urban environments. Marine Corps photo by Lance Cpl. Rhita Daniel