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An opposition demonstrator gestures while carrying stones in front of a burning bus during a violent protest near Carlota airbase in Caracas, Venezuela, April 30, 2019. Armored vehicles plowed into anti-government protesters as troops loyal to Venezuelan President Nicolás Maduro tried to restore order; opposition leader Juan Guaidó took to the streets in an attempt to lead a military uprising against the embattled president. (CNS/Ueslei Marcelino, Reuters)