Once-in-a-century total solar eclipse sweeps across U.S.(7/15)

People watch solar eclipse in Salem, Oregon, the United States, on Aug. 21, 2017. A once-in-a-century total solar eclipse is spanning the continental United States on Monday, creating a 70-mile-wide (112 kilometers) path of totality stretching from Oregon in the Pacific Northwest to South Carolina on the Southeast Coast. (Xinhua/Yin Bogu)