Britain's Prince William carries his baby son in a car seat, as he leaves the Lindo Wing of St Mary's Hospital with his wife Catherine, Duchess of Cambridge, in central London July 23, 2013. Kate gave birth to the couple's first child, who is third in line to the British throne, on Monday afternoon, ending weeks of feverish anticipation about the arrival of the royal baby. (CATHAL MCNAUGHTON/REUTERS)
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