In this Dec. 8, 1987, file photo, 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.

In this Dec. 8, 1987, file photo, 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.