COLOMBIA-VENEZUELA-CRISIS-AID LIVE-CONCERT-GUAIDO

Venezuela's opposition leader Juan Guaido waves at the crowd during the "Venezuela Aid Live" concert, organized to raise money for the Venezuelan relief effort, at the head of the Tienditas International Bridge in Cucuta, Colombia, on February 22, 2019. - Guaido -- recognized by more than 50 countries as interim president -- attended the aid concert in Colombia despite having been barred from leaving the country by the government of rival Nicolas Maduro. (Photo by Luis ROBAYO / AFP) (Photo credit should read LUIS ROBAYO/AFP via Getty Images)