This combination photo shows, top row from left, media mogul Oprah Winfrey, former President George W. Bush, actress Julia Robert and musician Yo-Yo Ma, bottom row from left, guru Deepak Chopra, rapper Common, musician Questlove, and actress Jennifer Garner, who are among the participants in the 24-hour livestream event, The Call to Unite, beginning Friday, May 1 at 8 p.m. EDT. (AP Photo)