Patients from Charity Hospital float along the flooded stree

UNITED STATES - SEPTEMBER 01: Patients from Charity Hospital float along the flooded streets of downtown New Orleans, La., as they're returned to the hospital by boat after an attempted evacuation to a hospital outside the city failed due to lack of ground transportation. Charity Hospital, which was running on a generator after Hurricane Katrina slammed the city Monday, was forced to move the patients after the generator ran out of fuel. Workers came under fire as they tried to evacuate the patients, and doctors sent out desperate e-mail messages to colleagues describing hellish conditions. (Photo by Michael Appleton/NY Daily News Archive via Getty Images)