The 1992 treaty allows the 34 member countries to conduct short notice, unarmed, reconnaissance flights over the other countries to collect data on their military forces and activities.
The US has also accused Russia of denying flights within 6.2 miles of the Georgia-Russia border, and denying a previously approved flight over a major Russian military exercise.
“Russia didn’t adhere to the treaty, so until they adhere, we will pull out,” Trump told reporters outside the White House in May.
America’s European allies, however, value the treaty, as it gives them the ability to collect aerial reconnaissance information that they would not necessarily have access to outside of the treaty.
The treaty gave US allies and partners without sophisticated satellite capabilities a way to gather and share — all the member countries could access imagery gathered on flights.
Pentagon officials have told CNN that the US military intends to share some of its intelligence and reconnaissance data from assets such as satellites with European allies in order to help compensate for any loss of critical information from the cessation of Open Skies flights.
The Trump administration similarly exited the Intermediate-Range Nuclear Forces Treaty over what the US and all NATO members said were Russian violations of the accord due to Moscow’s deployment of intermediate-range, nuclear-capable missiles.