Afterburners are devices used in some jet engines, particularly in military aircraft like the F-16 Fighting Falcon, to provide an extra boost of thrust. They work by injecting additional fuel into the exhaust stream, which ignites and produces more power. This allows the aircraft to accelerate rapidly, especially during takeoff or combat situations. The use of afterburners increases fuel consumption significantly, making them less efficient for sustained flight. However, they are essential for achieving supersonic speeds and enhancing maneuverability in air combat. Afterburners are a key feature in many high-performance jets, contributing to their speed and agility.