CBS News - A strong, long 7.6 earthquake with an epicenter in Guerrero state shook central southern Mexico on Tuesday, followed by an aftershock that shook central southern Mexico, swayed buildings in Mexico City and sent frightened workers and residents into the streets. The U.S. Geological Survey set the intensity at 7.6 on the Richter scale and said the epicenter was 11 miles underground. Mexico’s National Seismological Survey said the temblor had an epicenter southwest of Ometepec. - Go To Story