; Whereas, the Assad regime was subsequently accused of committing more chemical weapons attacks on Syrian civilians in opposition-held areas by using chlorine-based chemical weapons, in violation of the Chemical Weapons Convention; Whereas, on August 7, 2015, the United Nations Security Council adopted Resolution 2235, which established the UN–OPCW Joint Investigative Mechanism to identify which individuals and entities were responsible for the use of chlorine-based chemical weapons attacks in Syria; Whereas, on October 27, 2016, the UN–OPCW Joint Investigative Mechanism definitively confirmed that the Assad regime was responsible for the use of chemical weapons in Syria in Talmenes in April 2014, in Qmenas in March 2015, and in Sarmin in March 2016; Whereas, the United Nations Security Council adopted Resolution 2319 on November 17, 2016, which renewed the UN–OPCW Joint Investigative Mechanism mandate for one year; Whereas, the Russian Federation, along with China, blocked a United Nations Security Council Resolution on February 28, 2017, which would have implemented a sanctions regime against the Assad regime for its use of chemical weapons; Whereas, on the morning of April 4, 2017, another chemical weapons attack took place in the town of Khan Sheikhoun in Idlib Province, killing at least 58 people, including 11 children, according to the Syrian Observatory For Human Rights; Whereas Human Rights Watch reported that dozens of people showed symptoms consistent with exposure to chemicals after aircraft attacked the town; Whereas the Assad regime is the only entity operating in Syria that the UN–OPCW Joint Investigative Mechanism has confirmed use of aircraft to launch chemical weapons attacks; Whereas, United States Ambassador to the United Nations Nikki Haley announced that the United Nations Security Council would hold an emergency meeting on April 5, 2017, to discuss the chemical weapons attack in Idlib province: Now, therefore, be it