Sioux Falls, S.D. (KELO-AM) - State troopers in Minnesota were kept busy during the winter storm that hit the state February 20 and 21. Troopers responded to nearly 1,000 crashes across the state. Overall, the State Patrol responded to over 4,400 calls for service. More than two-thousand vehicles ended up in the ditch and there were 74 jackknifed semi trucks. Gov. Mark Dayton called out the National Guard to help recue stranded drivers.