FILE - In this Dec. 8, 1987 file photo U.S. President Ronald Reagan, right, and Soviet leader Mikhail Gorbachev exchange pens during the Intermediate Range Nuclear Forces Treaty signing ceremony in the White House East Room in Washington, D.C. Gorbachev's translator Pavel Palazhchenko stands in the middle. Trump's announcement that the United States would leave the Intermediate-Range Nuclear Forces, or INF, treaty brought sharp criticism on Sunday Oct. 21, 2018, from Russian officials and from former Soviet President Mikhail Gorbachev, who signed the treaty in 1987 with President Ronald Reagan. (AP Photo/Bob Daugherty, File)