Harriet Tubman is perhaps the most well-known of all the Underground Railroad's "conductors." During a ten-year span she made 19 trips into the South and escorted over 300 slaves to freedom.

RASCOE: Now you can add one more thing to that list, author. Bob's new book is all about one of his idols, Harriet Tubman, who he's called the first Black superhero. In fact, when asked this ...