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©Elyxandro Cegarra/ZUMAPRESS.com/MAXPPP - February 11, 2019 - Caracas, Venezuela - Venezuelan migrants rest as they walk on the road from Cucuta to Pamplona, in Norte de Santander Department, Colombia, on February 11, 2019. .Opposition leader Juan Guaido, recognized by some 50 countries as Venezuela's interim president, warned the military Sunday that blocking humanitarian aid from entering the country is a ''crime against humanity