While there are dozens of different types of drones, they basically fall into two categories: those that are used for reconnaissance and surveillance purposes and those that are armed with missiles and bombs.
The use of drones has grown quickly in recent years because unlike manned aircraft they can stay aloft for many hours (Zephyr a British drone under development has just broken the world record by flying for over 82 hours nonstop); they are much cheaper than military aircraft and they are flown remotely so there is no danger to the flight crew.
While the British and US Reaper and Predator drones are physically in Afghanistan and Iraq, control is via satellite from Nellis and Creech USAF base outside Las Vegas, Nevada. Ground crews launch drones from the conflict zone, then operation is handed over to controllers at
One person ‘flies’ the drone, another operates and monitors the cameras and sensors, while a third person is in contact with the “customers”, ground troops and commanders in the war zone. While armed drones were first used in the Balkans war, their use has dramatically escalated in Afghanistan, Iraq and in the CIA’s undeclared war in Pakistan.