Mark Zuckerberg and Priscilla Chan are having another daughter

Facebook CEO Mark Zuckerberg announced in a Facebook post this morning that he and his wife, Priscilla Chan, are expecting their second daughter. "I cannot think of a greater gift than having a sister and I'm so happy Max and our new child will have each other." "We are all better people because of the the strong women in our lives -- sisters, mothers and friends. We can't wait to welcome our new little one and do our best to raise another strong woman." The couple had their first child, Max, just over a year ago. Shortly after she was born, the couple pledged to give away 99 percent of their wealth.