Venezuela’s National Assembly head Juan Guaido (C) waves to the crowd during a mass opposition rally against leader Nicolas Maduro in which he declared himself the country’s “acting president", on the anniversary of a 1958 uprising that overthrew military dictatorship, in Caracas on January 23, 2019. – “I swear to formally assume the national executive powers as acting president of Venezuela to end the usurpation, (install) a transitional government and hold free elections," said Guaido as thousands of supporters cheered. Moments earlier, the loyalist-dominated Supreme Court ordered a criminal investigation of the opposition-controlled legislature. (Photo by Federico PARRA / AFP) (Photo credit should read FEDERICO PARRA/AFP/Getty Images)