Predator drones have been in the headlines lately. These high-tech, unmanned aircraft are most often used for surveillance and missile attacks. The U.S. military has increased their use in Afghanistan and Pakistan. The debate focuses on whether their effectiveness in killing enemy combatants comes at the expense of too many lost civilian lives.
Aerial drones aren't used only in war, and they aren't used only overseas. Weaponless Predators also patrol American skies. The Department of Homeland Security's Customs and Border Protection division has five of them to patrol the U.S. border with Canada.
Host Liane Hansen speaks with Michael Kostelnik, assistant commissioner for air and marine operations at U.S. Customs and Border Patrol, about unmanned drone surveillance along the Canadian border.