We stopped here on our way back to Las Vegas from the Grand Canyon West Canyon. Crossing the Colorado River, Hoover Dam is the largest dam in the United States, also known as the "Desert Drill". To watch the Hoover Dam carefully, you need to walk on the high Mike O" Callaghan-Pat Tillman Memorial Bridge (260 meters from the water surface). The bridge is an arch bridge across the Colorado River connecting Arizona and Nevada. The McO'Callahan-Patterterman Memorial Bridge is named after Nevada Governor McO'Callahan and local American football player Patterterman. The latter joined the Army from the Arizona Cardinals and died in Afghanistan. The Memorial Bridge is tall and steep. The wind is very strong that day. Standing on the bridge, it feels like being blown away by the wind.