Photographer's notes: "Aerial view of the winding original road descending to the dam on the Arizona side with the new bypass road under construction in the upper right, February 3, 2010." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Aerial view of the structurally complete bridge, Hoover Dam and Lake Mead, July 27, 2010. The highline crane has been disassembled and removed." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Aerial view of the structurally complete bridge, Hoover Dam and Lake Mead, July 27, 2010. The highline crane has been disassembled and removed." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Aerial view of the structurally complete bridge, Hoover Dam and Lake Mead, July 27, 2010. The highline crane has been disassembled and removed." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Aerial view looking downstream of the bridge arch construction, the Nevada side hairpin turn of the old road, and the Colorado River, June 30, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Workers arrive via highline crane and manbasket to start their shift on the structurally complete arch, morning, view from Arizona side, September 9, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Aerial view of the completed arch before construction of the piers (columns) began. From the air, the arch appeared delicate and fragile. September 10, 2009." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "A high line crane system, which ran between the Arizona and Nevada sides of the canyon, was used to transport materials and workers during the bridge's construction." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Photographer's notes: "Ironworkers in Manbaskets, April 29, 2009 - Ironworkers were transported in manbaskets via a high line crane system to the end of the Arizona arch segment." Site Name: Mike O'Callaghan-Pat Tillman Memorial Bridge
Mayor C.D. Baker (center) meets with Lt. Col. Floyd White (left) and Col. James McGehee (right) as they prepare for Armed Forces Day at Nellis Air Force Base. Site Name: Nellis Air Force Base (Nev.)