On 4 July, 1910, in 100-degree heat at an outdoor boxing ring near Reno, Nevada, film cameras recorded-and thousands of fans witnessed-former heavyweight champion Jim Jeffries' reluctant return from retirement to fight Jack Johnson, a black man. After 14 grueling rounds, Johnson knocked out Jeffries and for the first time in history, there was a black heavyweight champion of the world. At least 10 people lost their lives because of Johnson's victory and hundreds more were injured due to white retaliation and wild celebrations in the streets. Public screenings received instantaneous protests...