Republican presidential nominee Donald Trump's campaign plane (L) sits on the same tarmac as Democratic nominee Hillary Clinton's campaign plane (R), at Washington National airport in Washington, U.S., September 16, 2016. REUTERS/Carlos Barria

Republican presidential nominee Donald Trump hugs two Medal of Honor recipients before delivering remarks at a campaign event at the Trump International Hotel in Washington, D.C., U.S., September 16, 2016. REUTERS/Mike Segar

U.S. Democratic presidential candidate Hillary Clinton speaks at the Black Women's Agenda Annual Symposium in Washington, U.S., September 16, 2016. REUTERS/Carlos Barria

French soldiers patrol on the beach in Marseille, August 7, 2016 REUTERS/Philippe Laurenson

A businessman walks on the esplanade of La Defense, in the financial and business district in La Defense, west of Paris, April 10, 2014. REUTERS/Gonzalo Fuentes/File Photo

Republican presidential nominee Donald Trump delivers remarks at a campaign event at the Trump International Hotel in Washington, D.C., U.S., September 16, 2016. REUTERS/Mike Segar

Ohio Governor John Kasich speaks as he withdraws as a U.S. Republican presidential candidate in Columbus, Ohio, U.S., May 4, 2016. REUTERS/Aaron Josefczyk

Louis Brooks at his house in the Lincoln Park neighborhood in Thomaston, Georgia, U.S. August 16, 2016. REUTERS/Tami Chappell