The National World War I Museum in Kansas City, Mo.
Visitors walk near a reflecting pool outside the main entrance to the National World War I Museum at Liberty Memorial in Kansas City, Mo. The museum focuses on the Great War, which started 100 years ago. (Charlie Riedel / Associated Press)
Museum pieces include a British heavy field gun, right, and a German howitzer. (Charlie Riedel / Associated Press)
A banner that indicated that two people from a home were serving in the military. (Charlie Riedel / Associated Press)
A visitor passes a display. (Charlie Riedel / Associated Press)
A reproduction of a London newspaper front page from 1914, which writes about the assassination of Archduke Franz Ferdinand. (Charlie Riedel / Associated Press)
