A Central Asian country of incredible natural beauty and proud nomadic traditions, most of the territory of present-day Kyrgyzstan was formally annexed to the Russian Empire in 1876. The Kyrgyz staged a major revolt against the Tsarist Empire in 1916 in which almost one-sixth of the Kyrgyz population was killed. Kyrgyzstan became a Soviet republic in 1936 and achieved independence in 1991 when the USSR dissolved. Nationwide demonstrations in the spring of 2005 resulted in the ouster of President Askar AKAEV, who had run the country since 1990. Former Prime Minister Kurmanbek BAKIEV overwhelmingly won the presidential election in the summer of 2005. Over the next few years, he manipulated the parliament to accrue new powers for the presidency. In July 2009, after months of harassment against his opponents and media critics, BAKIEV won reelection in a presidential campaign that the international community deemed flawed. In April 2010, violent protests in Bishkek led to the collapse of the BAKIEV regime and his eventual flight to Minsk, Belarus. His successor, Roza OTUNBAEVA, served as transitional president until Almazbek ATAMBAEV was inaugurated in December 2011, marking the first peaceful transfer of presidential power in independent Kyrgyzstan's history. Continuing concerns include: the trajectory of democratization, endemic corruption, poor interethnic relations, border security vulnerabilities, and potential terrorist threats.