Writer/Director Michael Kirk returned to Dakota Midday to talk about his new FRONTLINE documentary, "Cliffhanger," which premiers Tuesday night at 7:00 p.m. Central on SDPB-TV.  Based on interviews with key players including Speaker of the House John Boehner, White House adviser Gene Sperling and former Obama Chief of Staff William Daley, Cliffhanger investigates how a clash of politics and personalities led to one of the most bitter high-stakes standoffs in modern American history - a duel at the edge of the "fiscal cliff."