Ken Burns: Before he was Mark Twain, he was Samuel Langhorne Clemens — a barefoot boy from Missouri, chasing the river like a restless dream.He would grow to become America’s most beloved storyteller, a man whose humor could make a nation laugh, and whose truths could make it wince.But behind the white suit and the famous wit was a life marked by loss, … [Read more...] about Mark Twain’s Heart: Standing Beside Him in Life’s Hardest Hours