(Front row, L-R) Britain's Prince William, Duke of Cambridge, Britain's Catherine, Duchess of Cambridge, British Chancellor of the Exchequer Philip Hammond, Britain's Sophie, Countess of Wessex, and Britain's Prince Edward, Earl of Wessex attend a Service of Commemoration and Drumhead Service on Horse Guards Parade in central London on March 9, 2017, which honours the service and duty of both the UK Armed Forces and civilians in the Gulf region, Iraq and Afghanistan, and those who supported them back home, from 1990-2015. After the Drumhead Service, The Queen will officially unveil The Iraq and Afghanistan memorial. / AFP PHOTO / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)

(Front row, L-R) Britain's Prince William, Duke of Cambridge, Britain's Catherine, Duchess of Cambridge, British Chancellor of the Exchequer Philip Hammond, Britain's Sophie, Countess of Wessex, and Britain's Prince Edward, Earl of Wessex attend a Service of Commemoration and Drumhead Service on Horse Guards Parade in central London on March 9, 2017, which honours the service and duty of both the UK Armed Forces and civilians in the Gulf region, Iraq and Afghanistan, and those who supported them back home, from 1990-2015.
After the Drumhead Service, The Queen will officially unveil The Iraq and Afghanistan memorial. / AFP PHOTO / Justin TALLIS        (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)