As an extreme weather event stampeded across South Dakota Thursday evening, images that emerged on social media called to mind the 1930s Dust Bowl era. A destructive line of storms rips across Nebraska and South Dakota on May 12, leaving damage scattered all over the region.(Please go to the site to view the video)The multi-day severe weather threat across the Plains escalated on Thursday, with thunderstorms delivering powerful winds and massive hailstones across the region a day after a meteorologist was killed in a crash during a preceding storm. The extreme weather event has been declared a Derecho, a long-lived...