Award-winning documentary filmmaker Michael Kirk discusses his latest Frontline documentary “Netanyahu at War” which profiles the polarizing Israeli Prime Minister, examines his political relationships and traces his path to power. The film examines how Netanyahu's politics have won him support and intense criticism at home and abroad, particularly after his attempt to obstruct President Obama’s nuclear deal with Iran before U.S. Congress last March. Premieres Jan. 5 at 9 p.m. on PBS and online.