As the Senate holds its first-ever public hearing on drones and targeted killings, we turn the second part of our interview with Jeremy Scahill, author of the new book, "Dirty Wars: The World Is a Battlefield." Scahill charts the expanding covert wars operated by the CIA and JSOC, the Joint Special Operations Command, in countries from Somalia to Pakistan. "I called it 'Dirty Wars' because, particularly in this administration, in the Obama administration, I think a lot of people are being led to believe that there is such a thing as a clean war," Scahill says. He goes on to discuss secret operations in Africa, the targeting of U.S. citizens in Yemen and the key role WikiLeaks played in researching the book. He also reveals imprisoned whistleblower Bradley Manning once tipped him off to a story about the private security company Blackwater. Scahill is the national security correspondent for The Nation magazine and longtime Democracy Now! correspondent. For the past several years, Scahill has been working on the "Dirty Wars" film and book project, which was published on Tuesday. The film, directed by Rick Rowley, will be released in theaters in June.

Full transcript of the discussion available here.