One of the United States' most prolific and beloved authors and poets has died at the age of 86. Maya Angelou was a Renaissance woman whose life inspired six autobiographies, including her internationally celebrated first memoir, I Know Why the Caged Bird Sings.  Angelou was found unresponsive in her Winston-Salem, N.C., home. Her death comes just days after she canceled an appearance in which she was to be honored at the Major League Baseball Beacon Awards luncheon in Houston.