Passport Please

Robert Whiting, an elderly gentleman of 83, arrived in Paris by plane. At French Customs, he took a few minutes to locate his passport in his carry on."You have been to France before, monsieur?" the customs officer asked sarcastically.
Mr. Whiting admitted that he had been to France previously.
"Thenyou should know enough to have your passport ready."
The American said,"The last time I was here, I didn't have to show it."
"Impossible. Americans always have to show their passports on arrival in France!"
The American senior gave the Frenchman a long hard look. Then he
quietly explained, ''Well, when I came ashore at Omaha Beach on D-Day in
1944 to help liberate this country, I couldn't find a single Frenchmen
to show a passport to."