For the third time in the past year, NBC News has been caught selectively editing video for political gain, with the most recent instance coming on the Monday, January 28 Martin Bashir program. Bashir ran heavily edited video showing Neil Helsin, whose 6-year-old son was killed in the Newtown shooting, appearing to be heckled by audience members during a legislative hearing on gun control. The chorus of criticism from media critics on the right and left forced MSNBC to backtrack, but not apologize. On the Wednesday, January 30 Bashir program, liberal fill-in host Ari Melber of The Nation magazine offered...