NEW ORLEANS, LA - AUGUST 28: Former President George W. Bush greets people during a visit to the Warren Easton High School to mark the 10th anniversary of Hurricane Katrina on August 28, 2015 in New Orleans, Louisiana. The former President's visit came as the town prepares to honor the tenth anniversary of Hurricane Katrina, which killed at least 1836 and is considered the costliest natural disaster in U.S. history, on August 29. (Photo by Joe Raedle/Getty Images)
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Getty Images News Joe Raedle