"Under President Barack Obama, the CIA has stepped up its drone strikes in the tribal zone of Pakistan bordering Afghanistan, targeting not only high-level al Qaeda and Taliban targets but largely unknown foot soldiers as well.

Following a directive first issued by former President George W. Bush and continued by Obama, the CIA has widened the "target set" for drone strikes in Pakistan, Reuters reported last month

The United States is believed to control the fleet of drones from CIA headquarters in Virginia, coordinating with civilian pilots near hidden airfields in Afghanistan and Pakistan who fly the drones remotely, according to Alston, an Australian who teaches at New York University School of Law.

"Because operators are based thousands of miles away from the battlefield, and undertake operations entirely through computer screens and remote audio-feed, there is a risk of developing a 'Playstation' mentality to killing," he said, referring to the popular Sony <6758.T> video game console.

Under international law, targeted killings are permitted in armed conflicts when used against fighters or civilians who engage directly in combat-like activities, Alston said. "But they are increasingly being used far from any battle zone" "

Reuters June 3