Americans with telescopes, cameras and protective glasses staked out viewing spots along a narrow corridor from Oregon to South Carolina to watch the moon blot out the midday sun Monday in what promised to be the most observed and photographed eclipse in history.

Sky-watchers everywhere — and millions were expected to peer into the sun — set out lawn chairs and blankets and awaited the first total solar eclipse to sweep coast-to-coast across the U.S. in practically a century. Astronomers were giddy with excitement. [Source: AP]