Rescue crews and civilians painstakingly searched through rubble Tuesday in the hopes of finding survivors trapped under debris after a powerful earthquake left thousands missing in dozens of cities and towns in western Colombia. Meanwhile, in the capital Bogota, volunteers worked diligently to collect donations indented for the victims of the powerful magnitude 7.4 earthquake that struck Monday. Colombian President Abelardo de la Espriella said at least 181 people died in the quake.