The Russian Foreign Ministry announced on the 18th that Russia will officially withdraw from the open sky treaty from the same day. The announcement said that Russia was forced to withdraw from the open sky treaty, and the United States should bear full responsibility. The real purpose of the United States' unilateral destruction of the treaty is to provoke an "arms race". The announcement reviewed Russia's implementation of the treaty in the past 20 years, saying that Russia is the country with the largest number of observation missions among all parties, and all parties have conducted 1580 reconnaissance flights in Russian territory. The announcement said that Russia believes that the fruitful implementation of the treaty in the past shows that it is a good tool for strengthening trust and security among States parties, and creates more opportunities for objectively and fairly assessing the military potential and military activities of participating countries. However, the treaty eventually became a victim of the domestic political struggle in the United States. The withdrawal of the United States from the treaty has undermined the interests of all countries and is the initiator of the collapse of the open sky treaty system. The announcement also said that Russia respects the decision of other States parties to the treaty to continue to implement the treaty and hopes that all parties will carry out constructive and fruitful cooperation. In November 2020, the United States announced its formal withdrawal from the treaty. The open sky treaty was signed in 1992 and entered into force in 2002. States parties to the treaty may conduct unarmed aerial reconnaissance of each other's territory in accordance with the provisions. The treaty is an important confidence building measure after the end of the cold war, which helps to enhance transparency and reduce the risk of conflict. The United States, Russia and most NATO countries signed the treaty. (outlook new era)