Somewhere in Europe circa 1918, from a series of World War I views. "Dead German artilleryman." Bain News Service glass negative. View full size.

Washington, D.C., or vicinity, 1935. "Waterman Arrowplane." Waldo Waterman's roadable airplanes had no trouble getting airborne, but they never really took off. Harris & Ewing Collection glass negative. View full size.

Boston's Tremont Street circa 1906. "Adams House and Keith's Theatre," noted vaudeville venue. 8x10 glass negative, Detroit Publishing Co. View full size.

Washington, D.C., circa 1921, looking up Georgia Avenue at Howard Place, and Jacob Katzen's grocery, dealer in Velvet Kind ice cream and Whistle. Another Harris & Ewing glass negative from the "traffic" series. View full size.

Boston, Massachusetts, circa 1905. "North Station." Frozen forever at 10:40 a.m. 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.

        This war is not like any other. It may reach your street -- your home -- at any moment. You may be fighting in this war tomorrow, or next week, or next month. Your government asks of you one simple thing, but one very important thing ... Learn and remember what to do if enemy planes and bombs come.

July 1942. "West Danville, Vermont. Guy Davenport, 11, and Maynard Clark, 14, reading the air raid instructions posted in Gilbert S. Hastings' post office and general store." Photo by Fritz Henle, Office of War Information. View full size.

July 22, 1936. "Aerial view of Pan American Airways 'China Clipper' (Martin M130 Flying Boat) over San Francisco with Coit Memorial Tower at left. Clyde H. Sunderland, commercial and aerial photographs, Oakland, Calif." View full size.