Former President Bill Clinton, left, Sen. Barack Obama, center, and former president George Bush meet with hurricane Katrina evacuees in the Reliant Center adjacent to the Astrodome in Houston, Monday, September 5, 2005. (AP Photo/Richard Carson, Pool)

Photo by: RICHARD CARSON

Former President Bill Clinton, left, Sen. Barack Obama, center, and former president George Bush meet with hurricane Katrina evacuees in the Reliant Center adjacent to the Astrodome in Houston, Monday, September 5, 2005. (AP Photo/Richard Carson, Pool)