Drones used for first time in major search at Grand Canyon
(WorldNews France)

PHOENIX -- The desperate effort this week to find two hikers who disappeared at the bottom of the Grand Canyon represented the National Park Service`s most extensive use yet of drones in a search-and-rescue mission. The Grand Canyon is the only national park with its own fleet of unmanned aircraft for reaching people who have gotten lost, stranded, injured or killed. Under a program that began last fall, it has five drones and four...