Britain's Queen Elizabeth II attends a ceremony at Tweedbank Station in Tweedbank on the Scottish Borders on September 9, 2015 to officially open the Borders Railway on the day that The Queen becomes Britain's longest-serving monarch. Britain celebrated Queen Elizabeth II becoming the country's longest-serving monarch with a flotilla down the River Thames, a gun salute and the peal of Westminster Abbey's bells. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
