A photograph of Maya Miller, International Women's Year (IWY) Coordinating Committee; Jo Gonzales, luncheon mistress of ceremonies; and Gloria Steinem, keynote speaker, at the Nevada Women's Conference that was held in Las Vegas in 1977. Site Name: Las Vegas Convention Center

Photographer's notes: "Aerial view, April 10, 2012. Note: I was commissioned to photograph over the bridge and dam in April 2012, more than a year after my project was complete." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge

Photographer's notes: "Aerial view, April 10, 2012. Note: I was commissioned to photograph over the bridge and dam in April 2012, more than a year after my project was complete." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge

Photographer's notes: "Aerial view, April 10, 2012. Note: I was commissioned to photograph over the bridge and dam in April 2012, more than a year after my project was complete." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge

A comparison of an image of Hoover Dam's upstream face in February 1935 to an image taken later that year, after the waters of Lake Mead had risen. The captions read "February 1935- Boulder Dam today." Boulder Dam was officially re-named Hoover Dam in 1947.

Providing security and access to both automobile and pedestrian traffic is handled differently along Las Vegas Boulevard and has changed over the years on the Strip. Here a small, elevated berm and curbing in front of the Linq Hotel and Casino is all the separates the two uses in the contested area.

Providing security and access to both automobile and pedestrian traffic is handled differently along Las Vegas Boulevard and has changed over the years on the Strip. Here a small, elevated berm and curbing in front of the Linq Hotel and Casino is all the separates the two uses in the contested area.