of modernather rocketry. talk about his counter vision to size through his papers, diaries and artifacts. >> he attributes his first interest in space travel and his first interest in a career in science to a day 1899. he went outside with a saw and a hatchet, and he was meant to trim the dead branches off a cherry tree. and he climbed the tree. he made himself a ladder. and while he was up in the tree, he looked down on the field around him and he thought how wonderful it would be to build some kind of a device that coul d leave the earth and maybe travel to mars. >> watch c-span's cities tour today on american history tv. the c-span cities tour working with our cable affiliates and visiting cities across the country. >> special representative for afghanistan and pakistan, richard olson, testify to the house foreign affairs committee. he said pakistan is becoming a more constructive partner but more needs to be done to target terrorist groups operating there. other topics included pakistan's nuclear arsenal