Citing Russian violations of the 2002 Open Skies Treaty, which allows more than 30 nations to conduct unarmed cross-border observation flights, President Trump said he intends to withdraw the U.S. from the pact. "Russia didn't adhere to the treaty," he explained. Other signatories have been notified that Washington will exit in six months. A Russian Foreign Ministry official called it "another blow" to the "already weakened" system to foster security in Europe, referring to last year's U.S. withdrawal from a 1987 nuclear arms treaty. Trump said the decision wasn't the end, expressing confidence that "we'll make a new agreement."