According to the same sources, the U.S. lost nine drones just from April 1 until the signing of the ceasefire. The MQ-9 Reaper, produced by General Atomics Aeronautical Systems, is a remotely piloted aircraft used for intelligence, surveillance, and reconnaissance missions. It can also carry out precision strikes. Such drones are easier to shoot down because they are designed for counterterrorism environments with little to no air defense, not for countries with modern missile systems. However, these are not the greatest losses suffered by U.S. forces. In the war, an "invisible F-35" was hit, an F-15 was shot down over Iran, and three F-15 aircraft were downed by "friendly fire" over Kuwait. Additionally, a U.S. AWACS was destroyed in missile attacks, and several aerial tankers were damaged or destroyed.