Reuters: The Mississippi River on Friday burst through an earthen levee that may have been weakened by burrowing muskrats, swamping a Missouri town and adding to billion-dollar losses in US Midwest flooding that has fueled fears of soaring world food prices. The levee break, the 36th in the last two weeks, sent a torrent of muddy water into Winfield, a town of about 800 people north of St. Louis, where officials said about 3,000 acres (1,214 hectares) of crop land was submerged. In …