Workers repair the track along a railroad bridge over Lake Pontchartrain between New Orleans and Slidell, September 6, 2005. Engineers pumped flood waters out of the streets of New Orleans on Tuesday, although fires raging across the devastated city hindered efforts to find those who survived Hurricane Katrina and the thousands feared dead in a disaster that has shaken America. REUTERS/David J. Phillip/Pool DJP SS**NY**/HK/DH