U.S. use of drones for surveillance and military attacks is on the rise. Drones have been used in Afghanistan, Pakistan, Somalia, Yemen, the Philippines, Libya, Mali, and Lebanon, as well as for domestic surveillance. The Guardian newspaper reports that between 3,000 and 4,500 people have been killed by U.S. drone strikes—over 200 were children, and at least 400 were civilians. Ending drone warfare is a necessary step toward building a more peaceful world.