charles f. merciy emercier, and if you questions please don't hesitate. on behalf of the national park service, i hope you guys enjoyed your ride, okay? >> you did a fine job. >> thank you. >>> you've been watching our weekly seary, american artifacts on c-span3 american history tv. you can view this and all our other programs online at c-span.org/history. >> thursday marks the 100th anniversary of the national park service. tonight we bring you a number of national park service tours from our american artifacts and real america programs. some of the sites include congress hall in philadelphia. the manakasee battlefield and the appomattox courthouse and that starts on american history tv. ♪ ♪ 100 years ago president woodrow wilson signed a bill creating the national park service and thursday we look back on the past century of these care takers of america's natural and historic treasures. beginning at 10:00 eastern and throughout the day we take you to national park service sites throughout the country as recorded by c-span. at 7:00 p.m. eastern we are li

charles f. merciy emercier, and if you questions please don't hesitate. on behalf