A gas tank and shipping containers obstructing passage to Venezeula are seen on the Tienditas International Bridge in an aerial photograph taken over Cucuta, Colombia, on Wednesday, Feb. 6, 2019. Venezuela's Nicolas Maduro has an offer for the U.S.: If you want to bring humanitarian aid into the country, you must lift economic sanctions first. Photographer: Ivan Valencia/Bloomberg
A gas tank and shipping containers obstructing passage to Venezeula are seen on the Tienditas International Bridge in an aerial photograph taken over Cucuta, Colombia, on Wednesday, Feb. 6, 2019. VeneShow more

As Nicolas Maduro and Juan Guaido argue aid, Venezuela's sick struggle to survive