Zimbabwean opposition Movement for Democratic Change (MDC) supporters shout political slogans and hold placards during a protest against the Zimbabwean government on May 28, 2016 in Bulawayo. Opposition calls for veteran President Robert Mugabe, ruling Zimbabwe since independence from British colonial rule in 1980, to step down. Mugabe easily defeated the MDC of Morgan Tsvangirai to win the last election in 2013, in a vote that was described by the United States as not credible. / AFP PHOTO / ZINYANGE AUNTONY (Photo credit should read ZINYANGE AUNTONY/AFP/Getty Images)
