Cars of WW I

Lydie Broyon, of France, dressed like a WWI nurse, poses in front a U.S Ford T 1918 ambulance during the Retromobile vintage cars exhibition, in Paris, Wednesday, Feb. 5, 2014. The exhibition runs until Friday Feb. 7, 2014. (AP Photo/Jacques Brinon) (AP)

An actor dressed like a WWI soldier poses in front of a 1914 Renault AG1, known as Taxi de la Marne, during the Retromobile vintage cars exhibition, in Paris, Wednesday, Feb. 5, 2014. The exhibition runs until Friday Feb. 7, 2014. The name Taxi de la Marne was not used until the outbreak of World War I, when the fleet of Paris taxis was requisitioned by the French Army to transport troops from Paris to the First Battle of the Marne in early September 1914. (AP Photo/Jacques Brinon) (AP)

Sebastien Struzik, right, dressed like a WWI soldier, and Sylvain Royer pose in a French made Dion Bouton 1913 during the Retromobile vintage cars exhibition, in Paris, Wednesday Feb. 5, 2014. The exhibition runs until Friday Feb. 7, 2014. (AP Photo/Jacques Brinon) (AP)

Herve Gruson, of France, dressed like a WWI soldier, poses in front Renault tank FT from 1918 during the Retromobile vintage cars exhibition, in Paris, Wednesday, Feb. 5, 2014. The exhibition runs until Friday Feb. 7, 2014. (AP Photo/Jacques Brinon) (AP)

Sylvain Royer poses with a WWI 75 Canon during the Retromobile vintage cars exhibition, in Paris, Wednesday, Feb. 5, 2014. The exhibition runs until Friday Feb. 7, 2014. (AP Photo/Jacques Brinon) (AP)