A protester holds a box with the picture of the Guatemalan President Otto Perez which reads, "Renuncia ya Corrupto", (You resigne now, corrupt), during a demonstration demanding his resignation, in downtown Guatemala City, May 30, 2015. Thousands gathered in the main square of Guatemala's capital on Saturday to protest against corruption after a wave of graft scandals prompted a Cabinet shake-up and the resignation of the vice president. Many of the demonstrators' placards called for President Otto Perez to also step down; others urged a crackdown on political corruption and crime - demands echoed in similar protests in other Guatemalan cities. REUTERS/Jorge Dan Lopez