Aerials of U.S.-Canada Border Along The Niagara River

NIAGARA FALLS, NY - JUNE 04: A rainbow appears in a cloud of mist rising over Horseshoe Falls, the largest of the Niagara Falls on June 4, 2013 at Niagara Falls, New York. The falls, which have a combined highest flow rate of any waterfalls in the world, stradle the U.S.-Canada border, drawn through the Niagara River, which drains Lake Erie into Lake Ontario. The falls, visited by millions of tourists on each side of the border, are also a major source of hydroelectric power for the region. The aerial view was seen from a helicopter flown by the U.S. Office of Air and Marine, (OAM), which monitors and patrols the U.S. northern border with Canana. (Photo by John Moore/Getty Images)