The contributions of African-Americans in the railroad industry will be the topic of a forum later today commemorating Black History Month. African-American labor helped build the railroads that were key to the development of the United States and the Upper Midwest. That work sparked the black labor movement. It also inspired many black inventors who's ideas helped the industry grow. Joining us on the line is Brian Clark, an electrical engineer with Minneapolis' light rail project, and one of the keynote speakers at today's forum.