2015 Event U.S. President Barack Obama vetoes the Keystone XL project, which would extend the existing Keystone pipeline and connect Canadian oil directly to U.S. Gulf Coast refineries; environmentalists claim the pipeline extension will add to climate change 1984 Event President Reagan vetoes sanctions against South Africa 1983 Event U.S.S.R. vetoes United Nations resolution deploring its shooting down of Korean plane 1975 Event U.S. vetoes proposed admission of North and South Vietnam to U.N. 1961 Event U.S.S.R. vetoes Kuwaits application for United Nations membership 1947 Event President Truman vetoes Taft-Hartley Act 1866 Event President Johnson vetoes civil rights bill; it later becomes 14th amendment