general lucius clay, who engineered the 1948 berlin airlift, is president kennedy's special advisor to berlin in the crisis. august 19, 1961. the first battle group of the united states seventh army is dispatched across 110 miles of soviet east germany to join forces in west berlin. the battle group, commanded by glover john's, is met by a cartel. as the convoy enters west berlin , it is greeted by an enthusiastic populace. troopss before, american under the city and now the cycle has come full circle as once more, united states soldiers move into the city. this time, they come as protectors to help keep law and necessaryfight, if for united states rights and a free berlin. the communist threat to west berlin is clear. our commitment to that city is firm. whatever the future, however the explosive berlin crisis may develop, the state army must inevitably continue to play a key role. >> join american history tv saturday for all day, live coverage of the world war i centennial symposium from norfolk, virginia. you will hear from scholars about the war that inaugurated the 20th century. c