In addition to replacing the president if necessary, it's the duty of the vice president to
a. review laws before the president signs them.
b. preside over the senate.
c. serve as speaker of the house.
d. serve as liaison to the judicial branch.

"harry t. moore (1905-1951) – civil rights activist, leader, and the first martyr of the civil rights movement. fannie lou hamer (1917–1977) – leader in the american civil rights movement; co-founder of the national women's political caucus and freedom democratic party. james farmer (1920–1999) – congress of racial equality."