The search for life in the rubble of Colombia’s powerful earthquake is growing more desperate as search teams push up against a key time threshold to locate survivors before it's too late. The devastation is testing Colombia's new president as his government scrambles to respond to the natural disaster and ensure aid makes to the vulnerable communities most affected by Monday's quake and more than 100 aftershocks. Aid agencies consider the first 48 to 72 hours crucial for retrieving people alive, though that limit can be extended if they have access to food and water.