Machines are taking over every aspect of our lives - including war. Battles these days are fought from thousands of miles away, and guns have been replaced by computers. Many soldiers' lives are saved, but at what cost?

That's the question posed in the trailer for "Good Kill," which stars Ethan Hawke as a former fighter pilot who now flies drones. He can obliterate enemies from the comfort of his trailer in Las Vegas, then go home to his beautiful house, beautiful wife (January Jones), and beautiful kids.

But Hawke wrestles with the moral implications of what he's doing. "Don't ask me if it's a just war. That's not up to us. To us, it's just war," his boss (Bruce Greenwood) shrugs.

"Good Kill" screened at the Venice and Toronto film festivals, and will open in theaters sometime in 2015.