PBS News Hour S41 E31 February 12, 2016

Friday on the NewsHour, Hillary Clinton and Sen. Bernie Sanders meet for their sixth Democratic debate. Also: World powers strike a fragile cease-fire agreement for Syria, Egypt’s women fight sexual violence through activism, a moment 1,000 years in the making for two religious leaders, Shields and Brooks talk the week in politics and the Holocaust’s silenced violins speak for horror and hope.