China, along with launching vast economic initiatives and military reforms, sought to expand its influence in the South China Sea and in Africa, solidifying its position as an emerging superpower, despite also causing series of conflicts around its frontiers. Within its border, China also enhanced its suppression and control of Hong Kong, Xinjiang, and Tibet. Global competition between China and the U.S. coalesced into a "containment" effort and a trade war. Elsewhere in Asia, the Koreas improved their relations after a prolonged crisis, and the War on Terror continued as a part of the U.S.'s continued military involvement in many parts of the world. The rise of the Islamic State of Iraq and the Levant extremist organization in 2014 erased the borders between Syria and Iraq, resulting in a multinational intervention. In Africa, South Sudan broke away from Sudan, and mass protests and various coups d'état saw longtime strongmen deposed. In the U.S., celebrity businessman Donald Trump was elected president amid an international wave of populism and neo-nationalism. The European Union experienced a migrant crisis in the middle of the decade and the historic United Kingdom EU membership referendum followed by withdrawal negotiations during its later years. Russia attempted to assert itself in international affairs, annexing Crimea in 2014. Information technology progressed, with smartphones becoming widespread. The internet grew from covering 28.9% to 54% of the world population, and also saw advancements in wireless networking devices, mobile telephony, and cloud computing. Advancements in data processing and the rollout of 4G broadband allowed data, metadata, and information to be collected and dispersed among domains at paces never before seen while online resources such as social media facilitated phenomena such as the Me Too movement, the rise of slacktivism, and online cancel culture. WikiLeaks gained international attention for publishing classified information on topics including Guantánamo Bay, Syria, the Afghan and Iraq wars, and United States diplomacy. Edward Snowden blew the whistle on global surveillance, raising awareness on the role governments and private entities have in global surveillance and information privacy. Baidu, Twitter and Instagram emerged to become among the top 10 most visited websites, while Wikipedia went from the 9th to the 5th most popular website, almost septupling its monthly visits. Yahoo significantly declined in popularity, descending from being the 1st to the 9th most popular site, with monthly visits declining by two-thirds. Google, Facebook, YouTube and Yandex maintained relatively consistent popularity