An anti-government Venezuelan migrant wearing protective gear rests from confrontations with Venezuelan National Guards who are blocking the Simon Bolivar International Bridge, in La Parada near Cucuta, Colombia, Sunday, Feb. 24, 2019, on the border with Venezuela. A U.S.-backed drive to deliver foreign aid to Venezuela on Saturday met strong resistance as troops loyal to President Nicolas Maduro blocked the convoys at the border and fired tear gas on protesters. (AP Photo/Fernando Vergara) The Associated Press