Supporters of Venezuelan opposition leader Juan Guaido take part in a rally in Caracas, on February 23, 2019. - Venezuela braced for a showdown between the military and regime opponents at the Colombian border on Saturday, when self-declared acting president Juan Guaido has vowed humanitarian aid would enter his country despite a blockade (Photo by Cristian HERNANDEZ / AFP) (Photo credit should read CRISTIAN HERNANDEZ/AFP/Getty Images)
