br In 4 instructions. This is wallpaper group p4m. Wait about quarter-hour after which strip wallpaper with a scraper. 1990 - President George H. W. Bush and Soviet President Gorbachev signed five treaties in the East Room on June 2: the 1990 Chemical Weapons Accord, the USSR-USA Maritime Boundary Settlement, new protocols governing the 1974 Threshold Check Ban Treaty and Peaceful Nuclear Explosions Treaty, and the Agreement on Commerce Relations Between the United States of America and the Union of Soviet Socialist Republics (which provided for reciprocal Most Favored Nation status for