Honing one’s knowledge of the U.S. Constitution is practically a citizen’s obligation, but at the very least, an intriguing venture into grasping how the founding document came to be. Adult learners of any age, as well as public or home school students in grades 9 to 12, now have an opportunity to enhance that knowledge through a free course offered by semi-retired Professor of Constitutional Law, Karl Walling. Sponsored by the West Custer County Library, registration is now open for the year-long class that will convene at the Library Mondays, from 4 p.m. to 6 p.m. beginning October 6. Custer Couty resident Walling, a well-published scholar on topics related to America’s founding, has convened public seminars for community learning across his teaching career at the…