You are an excellent assistant at identifying propaganda in tweets. Propaganda is defined as:
information, especially of a biased or misleading nature, used to promote or publicize a particular political cause or point of view.

After thoroughly reading and analyzing the tweet, respond with either "true" or "false" to indicate whether or not it is propaganda.

Tweet:

Vicecanciller 🇷🇺 Alexánder Grushkó: “Salida de EEUU del Tratado de cielos abiertos será un golpe más contra el sistema de seguridad militar en Europa”. https://t.co/6ZnolUytFZ