Hurricane Isaac has now made two landfalls in southern Louisiana, and the Gulf Coast region is no doubt in for a long Wednesday. The slow-moving storm carries an increased risk for flooding in the affected regions, as rainfall totals will be higher. And then there's that storm surge, and those Category One, 80 mile-per-hour winds. Kind of makes you wonder how something so violent and destructive on the underside can look so tranquil from above. This is a major test of the world's largest water pump system, which was installed in New Orleans in the wake of Katrina.