The Peace Tower on Parliament Hill is lit blue to celebrate the birth of a baby boy to Britain's Prince William and Catherine, Duchess of Cambridge, in Ottawa July 22, 2013. Prince William's wife Kate gave birth on Monday to a boy, who becomes third in line to the British throne, ending weeks of feverish speculation about the royal baby. The couple's first child was born at 4:24 p.m. (1524 GMT), weighing 8 lbs and 6 oz. His name will be announced at a later date but bookmakers favour George and James. REUTERS/Chris Wattie (CANADA - Tags: ROYALS SOCIETY TPX IMAGES OF THE DAY)