After $1.7 billion worth of work on a patchwork of levees, pumps, flood walls, canals and floodgates, New Orleans as a whole remains alarmingly vulnerable to another Katrina-like catastrophe, according to scientists and engineers who have studied the improvements and residents, politicians and watchdogs who have spoken to ABC News.
"Is it safe?" asked Roy Dokka, professor of civil engineering at Louisiana State University. "It's safer, not safe. It's better than what we had before Katrina,...Full Story