The North Vietnamese overwhelm U.S.-backed forces in the South and the United States steps up its bombing campaign. Nixon goes to the Kremlin to meet Brezhnev and signs the Strategic Arms Limitation Treaty (SALT). Kissinger negotiates with North Vietnam and proclaims, "Peace is at hand." Nixon is re-elected, and the United States finally withdraws from Vietnam. In Europe, rapprochement between East and West culminates in the Helsinki Accord. Apollo and Soyuz meet in space.