on the Middle East, he said the U.S. must militarily ensure a "lasting defeat" of Islamic State (ISIL) forces in Iraq and Syria. He also opined that the threats posed by Iran were as serious as those posed by the ISIL forces. He said he was not in favor of increasing the rate of prisoner releases from Guantanamo Bay. Carter was approved unanimously on February 1, 2015, by the Senate Armed Services Committee. He was confirmed by the Senate on February 12 by a vote of 93–5 and sworn in by Vice President Joe Biden on February 17. In May 2015, Carter warned the People's Republic of China to halt its rapid island-building in the South China Sea. In October 2015, Carter condemned Russian air strikes against ISIL and other rebel groups in Syria. On October 8, 2015, Carter, speaking at a meeting of NATO defense ministers in Brussels, said he believed Russia would soon start paying the price for its military intervention in Syria in the form of reprisal attacks and casualties. A controversy arose in December 2015 when it was revealed that Carter had used a personal email account while conducting official business as Secretary of Defense. In January 2016, at Carter's direction, the Department of Defense opened all military roles to women, overriding a request by the Marine Corps to continue to exempt women from certain positions. In June 2016, Carter announced that transgender individuals would be allowed to join and openly serve in the military. Other roles From 1990 to 1993, Carter was chairman of the Editorial Board of International Security. Previously, he held positions at the Massachusetts Institute of Technology, the Congressional Office of Technology Assessment, and Rockefeller University. In 1997, Carter and former CIA Director John M. Deutch co-chaired the Catastrophic Terrorism Study Group which urged greater attention to terrorism. In 1998, Carter, Deutch, and Philip Zelikow (later executive director of the 9/11 Commission) published an article on "catastrophic terrorism" in Foreign Affairs. From 1998 to 2000, he was deputy to William J. Perry at the North Korea Policy Review and traveled with him to Pyongyang. In 2001–02, he served on the National Academy of Sciences Committee on Science and Technology for Countering Terrorism, and advised on the creation of the Department of Homeland Security. Carter was also co-director of the Preventive Defense Project, which designs and promotes security policies aimed at preventing the