A line of soldiers firing handguns during a training session, circa 1920. (Photo by Keystone). P.S. All pictures are presented in high resolution.

People stand along Aviation Blvd. as the space shuttle Endeavour lands at LAX in Los Angeles. (Photo by Wally Skalij/Los Angeles Times/MCT)

“The White Dragontail, Lamproptera curius, is a species of swallowtail native to parts of South Asia and Southeast Asia. It belongs to the Dragontails genus, Lamproptera, of the Swallowtail (Papilionidae) family”. – Wikipedia. (Photo by Boti)

Actress Rosie Huntington-Whiteley arrives at the LACMA Art + Gala at LACMA on October 27, 2012 in Los Angeles, California. (Photo by Jon Kopaloff/FilmMagic)

A cadet lies on the grass after collapsing during a promotion ceremony at a police school in Bogota December 7, 2012. (Photo by John Vizcaino/Reuters)

Xochimilco – Island of the Dolls – Dead Line. Photo by Ramalama_22

Visitors view ice sculptures at the 29th Harbin International Ice and Snow Festival on January 5, 2013. (Photo by Associated Press)