The Last Word with Lawrence O'Donnell 03/17/15

US veteran charged with trying to join ISIS

Who is Tairod Pugh? And why did he allegedly want to join the Islamic State? Ari Melber talks to WNBC's Jonathan Dienst and The New York Times' Rukmini Callimachi about the latest American with ties to the terrorist group. ... more Duration: {{video.duration.momentjs}}