People queue to buy gas on August 26, 2015  in Cucuta, North of Santander Department, Colombia, as the border crisis with Venezuela is causing shortages in the city. Venezuelan President Nicolas Maduro ordered the border between Tachira and the Colombian department of Norte de Santander closed last week in response to an attack by unidentified assailants on a military patrol, which wounded a civilian and three soldiers on an anti-smuggling operation.  AFP PHOTO / LUIS ACOSTA        (Photo credit should read LUIS ACOSTA/AFP/Getty Images)