Florida Calls for Hurricane Evacuations MIAMI - Nearly a half-million people were ordered to evacuate as Hurricane Frances swirled toward Florida on Wednesday just weeks after Charley's devastating visit, threatening to deliver the most powerful one-two punch to hit a state in at least a century.    Those planning to ride out the storm snapped up canned food, water and generators, while military helicopters and planes were flown out of the area and Cape Canaveral's Kennedy Space Center said it would close on Thursday...