we've been speaking with larry knutson, the author. thanks for being with us here on american history tv. >> thank you. >> sunday night on american history tv, we'll hear about senator sam irvin's time, from his former aide and his iv.dson, judge sam evin early this his character and how the country lawyer relied on his knowledge of the law and personal convictions to guide the senate watergate committee. >> 200 years ago on august 24, 1814, british forces entered washington, d.c., and burned the capitol building, the president's house, and most of the federal buildings. next, steve vogel, author of "through the perilous fight -- six weeks that saved the nation," texas on a river truer of washington. his program is about 90 minutes. >> ipad a boat on the potomac for about 30 years. it is a great way to see the city. it is a different city. i think of the potomac is an obstacle on the way you have to cross on your way to d.c. is the reason the city is where it is. it's one of the most remarkable urban rivers in the country. we are in th