Rescuers recover three bodies from the rubble of three buildings that collapsed in downtown Rio Wednesday.<br/> Authorities say the cause of the collapse could have been a structural failure, highlighting concerns about Rio's infrastructure ahead of the 2014 soccer World Cup and the 2016 Olympics.<br/> The buildings, one 20 floors high, collapsed on Wednesday night in a cloud of dust and smoke just one block away from the city's historic Municipal Theater.<br/> Rescue teams pulled six people alive from the rubble. More than a dozen people are still missing.<br/> The buildings were mostly used for office space during the day and were almost empty when they came down.<br/> Deborah Lutterbeck, Reuters
