PBS News Hour S41 E25 February 4, 2016

Thursday on the NewsHour, candidates double down on attacks as the New Hampshire primary approaches. Also: Colombia’s president asks for U.S. aid to help FARC peace efforts, new Syrian hostilities threaten diplomatic talks, the controversy over online daily fantasy sports, a brand new natural wonder, the search for life’s meaning in the face of death and the role of fearlessness in black art.