Aftershock interrupts Haiti earthquake rescues

A strongly felt aftershock has shaken Haiti's capital, briefly interrupting efforts to rescue victims of Tuesday's big quake. 

Searchers trying to free survivors believed trapped under the Montana hotel withdrew from the mountain of rubble when the tremor hit Saturday morning. But they were back at it five minutes later, trying to reach voices they believe they have heard beneath the rubble.The US Geological Survey says the aftershock was measured at magnitude-4.5.(AP)