General Bertrand Ract Madoux (L), Governor of Invalides, welcomes Britain's Prince William, Duke of Cambridge (C) and his wife Britain's Kate, Duchess of Cambridge (R) as they arrive for a visit at the Hotel des Invalides in Paris on March 18, 2017. / AFP PHOTO / POOL / GONZALO FUENTES        (Photo credit should read GONZALO FUENTES/AFP/Getty Images)