An Egyptian policeman stands guard on Cairo's landmark Tahrir Square on January 25, 2017, during celebrations marking the sixth anniversary of the 2011 uprising that overthrew former Egyptian president Hosni Mubarak. January 25 marks the anniversary of the day in 2011 when protesters began to gather in Cairo's Tahrir Square demanding an end to longtime president Mubarak's 30-year rule. For 18 days hundreds of thousands demonstrated in a makeshift tent camp, denouncing social inequalities, government corruption and police abuse, and calling for democratic reforms. / AFP / STRINGER (Photo credit should read STRINGER/AFP/Getty Images)