sentences:  The Berlin Wall fell on November 9, 1989, and on November 15, the U.S. and U.S.S.R. submitted a joint resolution to the United Nations on the "Consolidation of International Peace, Security and Cooperation", the first such joint initiative.A December meeting in Malta brought Gorbachev and George H. W. Bush together for their first summit.The June 1990 summit in Washington brought several bilateral agreements, covering chemical weapons, trade, aviation, grain, maritime boundaries, peaceful uses of atomic energy, ocean exploration, student exchanges, and customs cooperation.