First lady Michelle Obama remembered poet, author and civil rights champion Maya Angelou on Saturday as a dominant cultural force who taught black women and people of all races to celebrate their own worth and beauty. Obama credited the writer's works, including her pioneering 1969 autobiography "I Know Why the Caged Bird Sings," with helping carry a young black girl from the South Side of Chicago to the White House. "She celebrated black women's beauty like no one ever had before," Obama said to more than 2,000 people at Angelou's private memorial service in North Carolina. "She told us our worth had nothing to do with what the world might say." true Former President Bill Clinton, media magnate Oprah Winfrey and actress Cicely Tyson also honored Angelou during the service at Wake Forest University in Winston-Salem, where she lived and taught for three decades. Angelou was 86 when she died at her home on May 28 after years of fail