In 1960 King and his family moved to Atlanta, his native city, where he joined his father as co-pastor of the Ebenezer Baptist Church. This new position did not stop King and his SCLC colleagues from becoming key players in many of the most significant civil rights battles of the 1960s. Their philosophy of nonviolence was put to a particularly severe test during the Birmingham campaign of 1963, in which activists used a boycott, sit-ins and marches to protest segregation, unfair hiring practices and other injustices in one of America’s most racially divided cities. Arrested for his involvement on April 12, King penned the civil rights manifesto known as the “Letter from Birmingham Jail,” an eloquent defense of civil disobedience addressed to a group of white clergymen who had criticized his tactics.