 Nonetheless, five thousand Soviet citizens attended events at Spaso House in 1957, more than in the previous twenty-three years.The building of the Berlin Wall and Cuban Missile Crisis caused a new chill in Russian-American relations, but after the assassination of President John F. Kennedy on November 22, 1963, both General Secretary Khrushchev and Foreign Minister Andrei Gromyko came to Spaso House to express their condolences to the new U.S.Ambassador, Foy D. Kohler.