Once More Into the Breaches

Today's NO Times-Picayune online has, typically, the most detailed story yet on what might have triggered the floodwall breaches that flooded New Orleans two weeks ago. While rumors of deliberate explosions rocket around the Internet, the TP story emphasizes, among other things, the crucial difference -- ignored wholesale on TV news -- between levees and floodwalls. The levees held, the floodwalls didn't.