In a broadcast exclusive, Nasser al-Awkali speaks out for the first time since the Obama administration confirmed drones had killed four U.S. citizens, including his son, Anwar, and teenage grandson, Abdulrahman. The cleric Anwar al-Awlaki was killed in Yemen on Sept. 30, 2011. Anwar’s 16-year-old son was killed in another drone strike two weeks later. "If the United States government gave me concrete evidence against Anwar, I would have done my best to convince Anwar to come to Sana’a or to go even to the United States to face a trial. But it was only allegations," al-Awlaki says, noting he believes the United States could have easily captured him alive. We also speak with Anwar’s uncle, Saleh bin Fareed, a Yemeni sheikh and tribal leader. "I am sure I could have handed him over — me and my family — but they never, ever asked us to do that," Fareed says. The story of the al-Awlakis is featured prominently in the new documentary film opening today, "Dirty Wars: The World Is a Battlefield," directed by Richard Rowley and written by Jeremy Scahill and David Riker.