and then this very interesting, quite beautiful, it is evocative of turning your swords into plowshares. what was once a weapon is now a beautiful piece of art. this is all happening between the u.s. and russia as far as arms control systems. but berlin, , germany is still a divided , city. people are quite angry about that. >> indeed, they were. in 1961, almost overnight, a physical wall divided berlin. this presented a challenge for the united states. retained a diplomatic presence with west germany. you can only have one ambassador in a country so we had the u.s. minister sent specifically to west berlin to cover the national interest and protect american citizens over there. very quickly, much to everyone's surprise, in 1989, that wall literally started to come down. katie, do you went to speak more about that particular minister? he played a crucial role in that. katie: the night of november 9, 1989, the u.s. minister to berlin, harry gilmore, is what was called the allied chairman and the chairmanship rotated monthly between the british, the french, and the u.s. the month of novem