
Former U.S. Homeland Security Secretary Jeh Johnson is sworn in before testifying to House Intelligence Committee task force as part of Russia investigation on Capitol Hill in Washington D.C., the United States, on June 21, 2017. (Xinhua/Ting Shen)

Former U.S. Homeland Security Secretary Jeh Johnson is sworn in before testifying to House Intelligence Committee task force as part of Russia investigation on Capitol Hill in Washington D.C., the United States, on June 21, 2017. (Xinhua/Ting Shen)