MSNBC's Rachel Maddow reports on flood risks at Nebraska reactors

MSNBC's Rachel Maddow has reported on the risks posed to the Fort Calhoun and Cooper atomic reactors in Nebraska by the historic flooding of the Missouri River. She also reports on the A.P. exposé about 3/4ths of U.S. reactors leaking tritium, and gives the latest news on the Fukushima nuclear catastrophe.