jeras. she's in the severe weather center. >> hey, carol. after a weekend of deadly tornadoes, the worst outbreak in the u.s. so far, more severe weather is expected for tomorrow across the nation's midsection. we're talking the mississippi valley and the ohio river valley. the latest on that, and the science of these tornadoes, coming up. i'm stephanie elam in new york, where we are tracking gas prices. six states are now paying gas -- paying for gas above $4 a gallon. i'll tell you which six those are. four states not far behind. i'll tell you what's going on. that's coming up in the next hour. carol. >> thanks to both of you. also ahead, a best-selling author on a mission to help educate girls in pakistan and afghanistan now defending his best-selling book. the author of "three cups of tea" accused of making it all up. still, some say, a lot of good came out of it. we'll talk with an ethicist about the controversy, next.