ATLANTA, Dec. 3 -- Standing in a borrowed auditorium 425 miles from home, the mayor of New Orleans implored displaced constituents Saturday to keep faith, put pressure on Washington policymakers and come home soon. "I miss y'all," Mayor C. Ray Nagin told more than 2,200 people temporarily living in the Atlanta area. "I want y'all back in the city of New Orleans. Red beans and rice just ain't the same without you. I want you back." But in a three-hour session marked by tears and outbursts, the response was not encouraging. "Come home?" many yelled back. "To what?" With New...