Erik Prince, founder of the controversial military contractor Blackwater, is on a different type of mission these days. Years after leaving the company he founded, he defends Blackwater's record in his recent book, Civilian Warriors. Prince bites back at detractors and reflects on Blackwater's controversial actions in Iraq -- including the deaths of up to 17 civilians in Baghdad's Nisour Square - in this interview, which originally aired on Day 6 in December, 2013.