By Newsbreak Producer, Taliesha Naidoo - After weeks of escalating tension, U.S. and Iranian officials faced each other Thursday at the U.N. Security Council, where America's envoy renewed threats against the Islamic Republic despite President Donald Trump's efforts to lower the temperature between the two adversaries. The US has imposed new sanctions on five Iranian officials it accuses of being behind the deadly crackdown on protesters as the Trump administration attempts to keep up pressure on Iran's leadership. The US Treasury says the sanctions target the Secretary of the Supreme Council for National Security and others. We speak to Professor of International Public Law UJ - Prof Hennie Strydom...