A drone, also known as an unmanned aerial vehicle (UAV), is an unpiloted aircraft - and it is not just in use for military purposes these days.
Drones are basically flying robots remotely controlled from the ground or that fly autonomously through software-controlled flight plans. They are often used in the military, serving as the "eye in the sky" that monitors what is happening on the ground. Unlike humans, they need no rest, and they don't put pilots' lives at risk in combat zones. Small civilian drones have become increasingly popular worldwide for fun and recreation as well as tasks as varied as filming, land-surveying, agriculture and parcel delivery. Two drone incidents at the White House in 2015 - one drone crashed on the White House lawn - highlight concern that drones could also be used for terrorist acts.
A weeklong protest against the US drone program drew over 5,000 to Ramstein, its most important air base in Europe. DW's Kathleen Schuster met with several of the people taking on the world's most powerful military.
China may be the world's biggest drone exporter, but its own drone fans are facing strict new rules about how and where to fly their craft. Now they'll need expensive training before they're allowed to fly - leaving this fast-growing market under a cloud of uncertainty.
San Franciso based tech start-up Zipline has developed a drone delivery system to get desperately needed blood and medical supplies to outlying hospitals and doctors in Rwanda. The first trial is proving so successful, they're hoping to expand operations in neighboring African countries.