WASHINGTON — The Bush administration now acknowledges it is trying to recover nearly $500 million from people who improperly received federal aid money intended to help victims of two deadly hurricanes, Katrina and Rita, along the Gulf Coast two years ago. It said the amount may increase further. "This is a moving target and not finite," said James McIntyre, a spokesman for the Federal Emergency Management Agency. The government's newest estimate of improper aid represents $494 million FEMA paid to 134,000 people who were ineligible for the aid they received. More than half the money went to people who couldn't...