A line of Houston Metro lift buses wait in front of the George R. Brown Convention Center in Houston, Texas, September 25, 2005. U.S. President George W. Bush said on Sunday that Congress ought to consider giving the U.S. military the lead role in responding to natural disasters, as he heard one general describe the Hurricane Katrina rescue effort as a "train wreck." The buses will transport returning evacuees from Hurricane Rita to alternate shelters. Minute Maid Park is seen in the background. REUTERS/Tim Johnson