Story : Rescue missions to save animals in the aftermath of Hurricane Katrina. Included: a dog that spent days on a rooftop is saved; four dolphins that were washed out to sea from the Marine Life Oceanarium in Gulfport, Miss., are rescued by a NOAA crew. Also: the evacuation of 19 penguins, two sea otters, a sea turtle and sea dragons from the Audubon Aquarium of the Americas in New Orleans.