NEW ORLEANS, LA - Saturday marks 10 years since Hurricane Katrina made landfall in Louisiana.

The category-three storm and 127 mph winds caused severe flooding damage all through the Grand Isle and Mississippi River. 

FEMA calls Katrina "the single most catastrophic natural disaster in U.S. history."

The hurricane cost an estimated $108 billion - making it the costliest in U.S. history.

Thursday, President Obama met with those who've spend the last decade rebuild. The president says the work is far from over.