Rosetta, the European Space Agency's cometary probe with NASA contributions, is seen in an undated artist's rendering. REUTERS/ESA/NASA/Handout

U.S. Secretary of State John Kerry speaks with Russian Foreign Minister Sergei Lavrov during the International Syria Support Group meeting at the Palace Hotel in Manhattan, New York, U.S., September 22, 2016. REUTERS/Darren Ornitz

U.S. Democratic presidential candidate Hillary Clinton speaks during a campaign event at the Frontline Outreach and Youth Center in Orlando, U.S. September 21, 2016. REUTERS/Carlos Barria

U.S. Secretary of State John Kerry (C), Russian Foreign Minister Sergei Lavrov (L), and United Nations Special Envoy for Syria Staffan de Mistura attend the International Syria Support Group meeting at the Palace Hotel in Manhattan, New York, U.S., September 22, 2016. REUTERS/Darren Ornitz

Rashid Meredov, Minister for Foreign Affairs of Turkmenistan, addresses the 71st session of the United Nations General Assembly at the UN headquarters in New York on September 22, 2016. / AFP PHOTO / DOMINICK REUTERDOMINICK REUTER/AFP/Getty Images

Bernard Madoff exits the Manhattan federal court house in New York in this January 14, 2009 file photo. REUTERS/Brendan McDermid/File Photo

Ramtane Lamamra, Deputy Prime Minister of Algeria, addresses the 71st session of the United Nations General Assembly at the UN headquarters in New York on September 22, 2016. / AFP PHOTO / DOMINICK REUTERDOMINICK REUTER/AFP/Getty Images

Aleksandar Vucic, Prime Minister of Serbia, addresses the 71st session of the United Nations General Assembly at the UN headquarters in New York on September 22, 2016. / AFP PHOTO / DOMINICK REUTERDOMINICK REUTER/AFP/Getty Images