Congolese policemen run to their vehicle during a clash with opposition activists participating in a march to press President Joseph Kabila to step down in the Democratic Republic of Congo's capital Kinshasa. REUTERS/Kenny Katombe

Wells Fargo CEO John Stumpf testifies before a Senate Banking Committee hearing on the firm's sales practices on Capitol Hill in Washington, U.S., September 20, 2016. REUTERS/Gary Cameron

Wells Fargo CEO John Stumpf testifies before a Senate Banking Committee hearing on the firm's sales practices on Capitol Hill in Washington, U.S., September 20, 2016. REUTERS/Gary Cameron

U.S. Senator Elizabeth Warren (D-MA) shows company documents to Wells Fargo CEO John Stumpf during his testimony before a Senate Banking Committee hearing on the firm's sales practices on Capitol Hill in Washington, U.S., September 20, 2016. REUTERS/Gary Cameron

Japanese Prime Minister Shinzo Abe speaks during a Reuters Newsmaker conversation in Manhattan, New York, U.S., September 21, 2016. REUTERS/Andrew Kelly

The Millennium Tower is pictured in San Francisco, California, U.S. September 14, 2016. REUTERS/Beck Diefenbach

Japanese Prime Minister Shinzo Abe speaks during a Reuters Newsmaker conversation in Manhattan, New York, U.S., September 21, 2016. REUTERS/Andrew Kelly

Pedestrians inspect cracks near the sinking Millennium Tower in San Francisco, California, U.S. September 14, 2016. REUTERS/Beck Diefenbach