“The US decision will enter into force after a six-month period. We with our like-minded people will work intensively to ensure that the US leadership revises its decision, ”the German minister said in a statement.

As Maas stressed, Berlin sees that "in recent years there have indeed been difficulties in implementing the treaty on the Russian side."

“We urge Russia to return to full implementation of the treaty,” he said.

On May 21, US President Donald Trump announced that the United States would withdraw from the Open Skies Treaty.

The decision takes effect after six months.