The year leading up to Martin Luther King, Jr.,’s assassination was a turbulent one for the country and for King personally. In his new book, “Death of a King,” talk show host and political commentator Tavis Smiley examines King’s last 12 months of life when many of those who once idolized him turned against him. Smiley recounts King’s personal struggles toward the end of his life, and his renewed commitment to controversial causes, including non-violence, the anti-war movement and the fight against poverty.