What Happened In a speech on Oct. 2 in Brussels, U.S. Ambassador to NATO Kay Bailey Hutchison demanded that Russia return to complying with the Intermediate-Range Nuclear Forces (INF) Treaty or else the United States would be forced to develop its own non-INF-compliant weapons to match Russian capabilities. In response, Russian Foreign Ministry spokeswoman Maria Zakharova said that "It seems that people who make such statements do not realize the level of their responsibility and the danger of aggressive rhetoric." Some Background on the INF The INF Treaty is a key arms control pact between the United States and Russia that halted a destabilizing buildup of intermediate-range nuclear missiles in Europe during the 1980s. The pact served as a cornerstone in efforts to end the Cold War.