Russia "a country where Jews are welcome". Human rights organizations and religious freedom advocates have criticized the state of religious freedom in Russia. In 2016, Putin oversaw the passage of legislation that prohibited missionary activity in Russia. Nonviolent religious minority groups have been repressed under anti-extremism laws, especially Jehovah's Witnesses. One of the 2020 amendments to the Constitution of Russia has a constitutional reference to God. Military development The resumption of long-distance flights of Russia's strategic bombers was followed by the announcement by Russian Defense Minister Anatoliy Serdyukov during his meeting with Putin on 5 December 2007, that 11 ships, including the aircraft carrier Kuznetsov, would take part in the first major navy sortie into the Mediterranean since Soviet times. While from the early 2000s Russia started placing more money into its military and defense industry, it was only in 2008 that full-scale Russian military reform began, aiming to modernize the Russian Armed Forces and make them significantly more effective. The reform was largely carried out by Defense Minister Serdyukov during Medvedev's presidency, under the supervision of both Putin, as the head of government, and Medvedev, as the commander-in-chief of the Russian Armed Forces. Key elements of the reform included reducing the armed forces to a strength of one million, reducing the number of officers, centralising officer training from 65 military schools into 10 'systemic' military training centres, creating a professional NCO corps, reducing the size of the central command, introducing more civilian logistics and auxiliary staff, elimination of cadre-strength formations, reorganising the reserves, reorganising the army into a brigade system, and reorganising air forces into an airbase system instead of regiments. According to the Kremlin, Putin embarked on a build-up of Russia's nuclear capabilities because of U.S. President George W. Bush's unilateral decision to withdraw from the 1972 Anti-Ballistic Missile Treaty. To counter what Putin sees as the United States' goal of undermining Russia's strategic nuclear deterrent, Moscow has embarked on a program to develop new weapons capable of defeating any new American ballistic missile defense or interception system. Some analysts believe that this nuclear strategy under Putin has brought Russia into violation of the 1987 Intermediate-Range Nuclear Forces Treaty. Accordingly, U.S. President Donald Trump announced the U.S. would no longer consider itself bound by the treaty's provisions, raising nuclear tensions between the two powers. This prompted Putin to state that Russia would not launch first in a nuclear