Duke and Duchess of Cambridge debut third child

Britain's Prince William and Kate, Duchess of Cambridge pose for a photo with their newborn baby son as they leave the Lindo wing at St Mary's Hospital in London London, Monday, April 23, 2018. The Duchess of Cambridge gave birth Monday to a healthy baby boy — a third child for Kate and Prince William and fifth in line to the British throne. [Photo: AP/Kirsty Wigglesworth]