President Trump confirmed Thursday that the United States would be withdrawing from the Open Skies Treaty, a 34-nation pact that allows countries to fly their aircraft over each other's territory to collect information on their own military forces.
The president told reporters that Russia's failure to comply with the treaty prompted him to take action.
"Russia didn't adhere to the treaty, so until they adhere, we will pull out," Trump said.
Trump also said that he expects the U.S. withdrawal will provoke Russia to negotiate a new deal.
"There's a chance we may make a new agreement or do something to put that agreement back together," Trump said. "I think what's going to happen is we're going to pull out and they're going to come back and want to make a deal."
The Trump administration did say it may reconsider its decision in the future.
"Effective six months from tomorrow, the United States will no longer be a party to the Treaty," Secretary of State Mike Pompeo said in a statement. "We may, however, reconsider our withdrawal should Russia return to full compliance with the Treaty."