The Organization for Security and Cooperation in Europe (OSCE) invited Steven Pifer to the OSCE “security days” forum in Vienna on June 25 to make a presentation on conventional arms control and confidence- and security-building measures (CSBMs). Several agreements cover these issues in the OSCE area. The Conventional Forces in Europe (CFE) Treaty limited NATO and Warsaw Pact armaments. An adapted CFE Treaty was negotiated in 1999 to impose national limits in place of bloc-to-bloc limits (since the Warsaw Pact had disbanded) but has not entered into force. The Vienna Document on CSBMs provides for measures such as information exchanges and notifications of military exercises that exceed certain thresholds. The Open Skies Treaty allows overflights of countries to observe military installations and formations. Pifer touches these agreements in his talk.
[Trump] didn't say one word about Ukraine and he had to be briefed on this stuff. The only person to say that the United States says the annexation of Crimea wasn't legal and disagrees with Russia was the president of Russia. The overall contrast [with Trump's criticisms of German Chancellor Angela Merkel, British Prime Minister Theresa May, and the EU earlier in the trip] coupled with Trump's inability to say Russia had done anything to contribute to the downturn of US-Russia relations, either way it's scary. Either he forgot there's a problem or he wasn't willing. He would have had no problem listing his grievances against Germany, but against Putin, he's not capable of saying anything.