OMAHA, Neb. (AP) — A major winter storm dropped more than a foot of snow on parts of Nebraska and Iowa, disrupting traffic and shuttering some schools, while blanketing other parts of the middle of the country. There were early closures of several coronavirus testing sites on Monday in Nebraska and Iowa, and both states saw 12 or 13 inches of snow in places by Tuesday morning. At least 4 inches of snow was expected into Tuesday across most of an area stretching from central Kansas northeast to Chicago and southern Michigan. Elsewhere in the U.S, a storm buried northern Arizona in snow on Monday while sending flurries to the outskirts of Las Vegas and Phoenix.