Nicolas Cheong Jin-suk has said that, "There's no knowledge of priests surviving persecution that came in the late forties, when 166 priests and religious were killed or kidnapped," which includes the Roman Catholic bishop of Pyongyang, Francis Hong Yong-ho. In November 2013 it was reported that the repression against religious people led to the public execution of 80 people, some of them for possessing Bibles. There are five Christian churches in Pyongyang, three Protestant, one Eastern Orthodox, and one Catholic. President Kim Il-sung and his mother were frequent patrons of Chilgol Church, one of the Protestant churches, and that church can be visited on tour. Christian institutions are state regulated by the Korean Christian Federation. The governing party front of North Korea is made mostly of Cheondoist parties, although the Workers' Party of Korea dominates it. There are around 300 active Cheondist churches in the DPRK. Mongolia The Mongolian People's Revolutionary Party (MPRP) propagated atheism until the 1960s. In the Mongolian People's Republic, after it was invaded by Japanese troops in 1936, the Soviet Union deployed its troops there in 1937, undertaking an offensive against the Buddhist religion. Parallel with this, a Soviet-style purge was launched in the People's Revolutionary Party and the Mongolian army. The Mongol leader at that time was Khorloogiin Choibalsan, a follower of Joseph Stalin, who emulated many of the policies that Stalin had previously implemented in the Soviet Union. The purge virtually succeeded in eliminating Tibetan Buddhism and cost an estimated thirty to thirty-five thousand lives. Vietnam Officially, the Socialist Republic of Vietnam is an atheist state as declared by its communist government. Art. 24 of the constitution of the Socialist Republic of Vietnam recognizes religious freedom. Non-Communist states Revolutionary Mexico Articles 3, 5, 24, 27, and 130 of the Mexican Constitution of 1917 as originally enacted included anticlerical provisions and restricted religious freedoms. The Articles were initially seldom enforced until President Plutarco Elías Calles, who sought to enact the separation of church and state established in the Constitution of 1917, took office in 1924. Calles' Mexico has been characterized as an atheist state and his program as aiming to eradicate religious practices in Mexico during the 20th century. There was an expulsion of foreign clergy and expropriation of Church properties. Article 27 prohibited any future acquisition of such property by churches, and prohibited religious corporations and ministers from establishing or directing primary schools. The