(CUCUTA, Colombia) — Venezuela’s National Guard fired tear gas on residents clearing a barricaded border bridge to Colombia on Saturday, as the opposition began making good on its high-risk plan to deliver humanitarian aid to Venezuela despite objections from President Nicolas Maduro. By midday, opposition leader Juan Guaido pulled himself onto a semi-truck and shook hands with its driver as he and Colombian President Ivan Duque gave a ceremonial send off to an aid convoy looking to transport nearly 200 metric tons of mostly U.S.-supplied emergency food and medical supplies from the Colombian border city of Cucuta.