NEW ORLEANS – The Coast Guard is responding to a barge allision at mile marker 435.8 on the Mississippi River near Vicksburg, Mississippi, Wednesday. Watchstanders with Coast Guard Sector Lower Mississippi River received a call at 10:19 a.m., stating the towing vessel Wally Roller allided with the Vicksburg Railroad Bridge. All six barges were reported to have broken free and have now been safely...