Just before Martin Luther King Day, Cal Williams likes to share his story with school children of Anchorage, Alaska. He goes to classrooms dressed up as a 1960's Civil Rights marcher. Williams can still belt out songs like "We Shall Overcome" and "Oh, Freedom". He sings them as if he were stepping in time to the music, along with other marchers. Williams was 22 years old when Martin Luther King inspired him to take an active role in the Civil Rights movement, but his awakening about the importance of this fight for justice came much earlier, at the age of 14. "I was in love at the time, and...