The Association for Unmanned Vehicle Systems International (AUVSI), a trade organization for the drone industry, is hosting a convention this week in Washington, DC. The show is a place for law enforcement, government officials, military officers, and private industry to meet, talk shop about unmanned robots, and buy and sell new drones.

Though the exhibition floor is filled with drones from manufacturers all over the world, most of the machines look fairly similar: There's the "matchstick with wings" design popularized by the Predator; the radially-symmetric simplicity of small, helicopter-like quadrotors; and the wedge-shaped flying wings.