The Superdome is surrounded by floodwaters from Hurricane Katrina on Wednesday, Sept. 7, 2005, in New Orleans. (AP Photo/David J. Phillip, Pool)

New Orleans residents walk through chest-deep floodwater after Hurricane Katrina made landfall on the Louisiana coast on Monday, Aug. 29, 2005. (AP Photo/Dave Martin)

Flood victims sit in chairs among trash outside the New Orleans Center next to the Superdome on Friday, Sept. 2, 2005. (AP Photo/Bill Haber)

Floodwaters from Hurricane Katrina fill the streets near downtown New Orleans on Aug. 30, 2005. (AP Photo/David J. Phillip)

Residents of Slidell, La., try to get to their homes on Tuesday, Aug. 30, 2005, after Hurricane Katrina flooded the area. (AP Photo/Mari Darr-Welch)

Rescue personnel search for victims as they traverse the Eighth Ward in the flooded city of New Orleans on Tuesday, Aug. 30, 2005. (AP Photo/Dave Martin)

Heavy floodwaters block many of the roadways in and around New Orleans as Hurricane Katrina pounds the area on Monday, Aug. 29, 2005. (AP Photo/Dave Martin)

The damaged roof of the Superdome is set against the downtown skyline in New Orleans on Friday, Oct. 14, 2005. (AP Photo/Don Ryan)

Floodwaters from Hurricane Katrina cover a portion of New Orleans on Tuesday, Aug. 30, 2005, a day after Katrina passed through the city. (AP Photo/David J. Phillip)

Arnold James carries a small bag of belongings through floodwaters as he tries to make his way on foot to the Superdome in New Orleans on Monday, Aug. 29, 2005. The roof on James' home had been blown off, forcing him to seek shelter elsewhere. (AP Photo/Dave Martin)

Volunteers set up cots on the floor of Houston's Astrodome on Thursday, Sept. 1, 2005, awaiting evacuees from Hurricane Katrina. (AP Photo/Pat Sullivan)

The sun rises over the repaired roof of the Superdome in New Orleans on Monday, Aug. 28, 2006, one year after it was heavily damaged by Hurricane Katrina. The stadium served as a shelter for thousands. (AP Photo/Alex Brandon)

Leo Dollide, 59, (far left) leads a group of residents waiting to board a U.S. Coast Guard helicopter to take them to the airport on Saturday, Sept. 3, 2005 in New Orleans. Dollide said he rode out Hurricane Katrina because he didn't have the money to leave. (AP Photo/Rob Carr)

New Orleans Superintendant of Police Eddie Compass (left), New Orleans Saints wide receiver Joe Horn (center) and former President George H.W. Bush chat on the field before the coin toss for the Saints' "home" opener against the New York Giants on Monday, Sept. 19, 2005, at Giants Stadium in East Rutherford, N.J. (AP Photo/Kathy Willens)

Shafts of light shine through holes in the roof of the Superdome as construction continues ahead of the 2006 season. (AP Photo/Alex Brandon)

A sign hangs on the Louisiana Superdome the day after its re-opening in New Orleans on Tuesday, Sept. 26, 2006. (AP Photo/Alex Brandon)

A tattered American flag flies in front of the blown-out Hyatt Hotel in New Orleans on Monday, Aug. 29, 2005. (AP Photo/Bill Haber)

Rescuers use an old rowboat to evacuate children and an elderly woman from their flooded homes in Gulfport, Miss., after Hurricane Katrina struck the Gulf Coast on Monday, Aug. 29, 2005. (AP Photo/John Bazemore)

Residents are rescued from their rooftop in their New Orleans neighborhood on Monday, Aug. 29, 2005. Officials had called for a mandatory evacuation of the city, but many residents remained. (AP Photo/Eric Gay)

Houses in New Orleans' Eighth Ward are surrounded by water on Tuesday, Aug. 30, 2005. (AP Photo/Dave Martin)

Displaced residents take cover from Hurricane Katrina at the Superdome, a last-resort shelter, on Sunday, Aug. 28, 2005. (AP Photo/Eric Gay)

A New Orleans resident walks through floodwaters coated with a fine layer of oil in the downtown area on Tuesday, Aug. 30, 2005. (AP Photo/Bill Haber)