WASHINGTON, Nov. 7 -- Amtrak (National Railroad Passenger Corp.) issued the following news: * * * Amtrak Celebrates Upgrades at Wisconsin Stations * Customers benefit from $11 million in federal investments COLUMBUS and TOMAH, Wisc. - Amtrak passengers have a more accessible experience at two Wisconsin stations following about $11 million in upgrades celebrated Wednesday. The Amtrak Empire Builder and Borealis trains each stop twice daily at the Columbus and Tomah stations. "Making stati  more