WASHINGTON D.C., July 12, 2016 (Xinhua) -- U.S. Attorney General Loretta Lynch swears an oath before giving testimony before a House Judiciary Committee hearing on Capitol Hill in Washington D.C., the United States, July 12, 2016. U.S. Attorney General Loretta Lynch on Tuesday steadfastly defended her decision not to charge Hillary Clinton in her email investigation, but also refused to discuss details of the case despite Congressional Republicans' grilling. (Xinhua/Yin Bogu)