Royal guffaws: The Queen and Prince Philip enjoy a hearty laugh during a reception outside the Cornw

CANADA - SEPTEMBER 20: Royal guffaws: The Queen and Prince Philip enjoy a hearty laugh during a reception outside the Cornwall civic centre yesterday. As a Canadian Forces 414 squadron flew past; drowning out Mayor Gerald Parisien's welcoming speech; the mayor deftly ad libbed the flypast was planned at that very moment for the royal couple's benefit. (Photo by Erin Combs/Toronto Star via Getty Images)