In 1987 a treaty was agreed on by Mikhail Gorbachev and Ronald Reagan. Russian foreign minister Sergey Lavrov has said that the US has been violating the treaty since 1999 by testing unmanned aerial combat vehicles with the same characteristics as land-based cruise missiles banned by the treaty, and has used ballistic target missiles for testing missile defence systems. Meanwhile the US said that it would exit the landmark Cold War nuclear missile treaty because of purported violations by Russia. Washington says that a new Russian medium-range missile system breaches the treaty, although US officials also have an eye on China as the 1987 pact does not constrain the rising Asian power. Trump said the US was suspending its obligations under the INF treaty and starting a process to withdraw in six months’ time. See