Readers take a colorful trip into the past to meet three African American who left indelible marks on U.S. history. Crispus Attucks was considered a martyr after his death at the Boston Massacre. Formerly enslaved Frederick Douglass became one of the most outspoken proponents of abolition and equal rights for African Americans. Harriet Tubman, also formerly enslaved, became perhaps the most famous conductor on the Underground Railroad. Together, the...