On 19 November 1949, the Kominform adopted another resolution on the Communist Party of Yugoslavia, which stated that the CPY had been hijacked by a group of ″murderers and spies" and declared that fighting against the "Tito gang" was a duty of all communist and workers′ parties. After Stalin's death, relations underwent normalisation heralded by the signing of the Belgrade declaration in June 1955, which expressly rescinded Stalin's policies towards Yugoslavia. Nevertheless, the SFRY never joined the USSR-led political and military block of socialist countries and remained one of the leading members of the Non-Aligned Movement, a grouping of countries that sought to be neutral in the Cold War. However, Yugoslav government's permission to Soviet Air Force to fly over the country, allowed Soviet Union to send advisors, weapons and troops to Egypt between Six-Day War and Yom Kippur War. Economic and cultural ties between the USSR and SFRY developed successfully until the late 1980s. 1991–2000 The breakup of Yugoslavia and the dissolution of the Soviet Union occurred nearly concurrently. Throughout the 1990s, FR Yugoslavia was hard hit with sanctions from the western world; meanwhile Russia was undergoing painful structural reforms that were accompanied by a steady economic decline in production until 1999. Relations between the countries were largely neglected until the spring 1999. In 1998, the Kosovo War began, followed by break-up of relations between Yugoslavia and the West and to the NATO bombing of Yugoslavia, which Russia strongly condemned. In March 1999, Russian president Boris Yeltsin described NATO's military action against sovereign Yugoslavia as an ″open aggression″. Russia condemned NATO at the United Nations and supported the statement that NATO air strikes on Serbia were an illegal military action. Volunteers and mercenaries from Russia were cited to have gone to Kosovo in large numbers to fight the KLA, and to resist and complicate NATO operations. Around the time of the bombing, a Russia-friendly rhetoric developed in the Serbian political team as Borislav Milošević, the brother of Slobodan Milošević and the Yugoslav ambassador to Moscow at the time, proposed that the Federal Republic of Yugoslavia could join the Union State which is composed by Belarus and Russia. 2000–present After Vladimir Putin became the President of Russia at the start of 2000, months after the NATO bombing of Yugoslavia, relations between the countries began to gain momentum. Following the overthrow of Slobodan Milošević, the new President of Yugoslavia Vojislav Koštunica