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The Safeguard-class rescue and salvage ship USS Grapple is also en route to the Gulf Coast. It was built for salvage, diving, firefighting and heavy lift capabilities. It can add hurricane recovery to its resume.
This satellite image is from around 10:30 a.m. CST on Aug. 31, 2005, as Tropical Depression Katrina storms the Great Lakes. The hurricane was responsible for at least 120 deaths and billions of dollars in damages.
It was a different scene the morning of Aug. 29, as Katrina hit land in southeastern Louisiana as a Category 4 storm, with maximum sustained winds of 145 mph, according to the National Hurricane Center.