A week after Colombia's deadly earthquake, hope lingers in the rubble

Cali: The noise of backhoes, cranes and bulldozers echoed across Colombia's quake-hit cities on Sunday as workers labored to remove rubble, though the chance of finding survivors was slim a week after the disaster.

Last Monday's 7.4 magnitude earthquake killed nearly 300 people and destroyed thousands of buildings. At least 140 people are still missing, authorities said.