rolla, missouri. a second person, a student at northwest missouri state university in maryville, is accused of posting a similar threat. the university of missouri board of curators is set to name a new interim president for the university system this afternoon. today's appointment comes three days after president tim wolfe and mizzou's chancellor resigned under pressure following weeks of unrest over the administration 's response to racial incidents. violent storms thundered through the midwest last night spawning tornados in iowa. this is the scene in iconium, about about 80 miles southeast of des moines. several building were damaged, an r-v was blown over and a tractor banged up. to the north in knoxville, much the same story. a string of confirmed tornados caused damage and toppled a semi. near avoca in western iowa, outbuildings were damaged on several farms by a confirmed tornado. to the east, high winds and heavy rains stalled traffic and caused numerous flight cancelations nbc's ron mott has more from chicago. << the so-called late fall storm is called the witch of november is appropriately named because of all the howling winds coming across the midwest ands especially her