People are silhouetted against the morning sky as they watch the sunrise of the spring equinox at the pyramids of Teotihuacan outside Mexico City. people are silhouetted against the morning sky as they watch the sunrise of the spring equinox at the pyramids of Teotihuacan, outside Mexico City, March 20, 2005. Hundreds of Mexicans and tourists gather at Teotihuacan every year to welcome spring equinox at the Pyramid of the Sun. . REUTERS/Henry Romero REUTERS