Two stories for the 4th of July: In part 1, "Lift Ev'ry voice and Sing," also known as the black national anthem. We'll hear performances of the song as historian Imani Perry discusses its meaning and importance to the civil rights struggle. In part 2, Frank Kameny recalls the early days of the gay rights movement. Kameny, now 85, led some of the first public demonstrations for gay equality, picketing the White House and staging 4th of July protests in the mid-1960s.