Maintainers assigned to the 99th Expeditionary Reconnaissance Squadron prepare to taxi a U.S. Air Force RQ-4 Global Hawk at Al Dhafra Air Base, United Arab Emirates, March 25, 2021. The RQ-4 Global Hawk is a high-altitude, long-endurance, remotely piloted aircraft with an integrated sensor suite that provides global all-weather, day or night intelligence, surveillance and reconnaissance capability.