Some poor people evacuated from New Orleans when Hurricane Katrina hit in 2005 say they are having trouble returning because they cannot get rental assistance.Although federal Section 8 vouchers are transferable to anywhere in the United States, many evacuees have had transfers denied or delayed because of a loophole in federal law allowing local agencies to reject moves to higher-rent areas such as New Orleans, The (New Orleans) Times-Picayune reported Sunday.The Housing Authority of New Orleans can't afford to pay for any incoming vouchers, said HUD spokeswoman Donna White. As a result, many out-of-town housing agencies have invoked the higher rent exception to refuse New Orleans transfers, the newspaper said. ...