Venezuela's President Nicolas Maduro gestures while delivering a speech in the framework of the "Youth Day" celebrations at the Bolivar Square in Caracas, Venezuela on February 12, 2019. - Venezuela's opposition leader Juan Guaido told tens of thousands of supporters on Tuesday that desperately-needed humanitarian aid would be brought into the country on February 23, despite opposition from President Nicolas Maduro. (Photo by Orangel HERNANDEZ / AFP)