Aral Sea fate. Since the disappearance of the Southeast Aral in 2008, Vozrozhdeniya effectively no longer exists as a distinct geographical feature. The area is now shared by Kazakhstan and Uzbekistan. In 1948, a top-secret Soviet bioweapons laboratory was established on the island, in the centre of the Aral Sea which is now disputed territory between Kazakhstan and Uzbekistan. The exact history, functions and current status of this facility are still unclear, but bio-agents tested there included "Bacillus anthracis", "Coxiella burnetii", "Francisella tularensis", "Brucella suis", "Rickettsia prowazekii", "Variola major" (smallpox), "Yersinia pestis", botulinum toxin, and Venezuelan equine encephalitis virus. In 1971, weaponized
Kazakhstan–Uzbekistan border awarding the city to Uzbekistan. Kazakhstan however gained the large city of Shymkent. A further complication were the Karakalpaks; the Soviets were unsure if they were Uzbeks, Kazakhs or a separate nationality altogether. Given the at-best weak sense of Karakalpak nationality, and their perceived closer links to the Kazakhs, they were given their own Karakalpak Autonomous Oblast within the Kazakh ASSR. This oblast was larger than the modern autonomous Republic of Karakalpakstan and extended considerably further eastwards, thereby cutting the Uzbek SSR in two, with a small exclave around Khiva. Poor economic performance in the oblast convinced Soviet leaders that