Sacked Finance Minister Hoshiyar Zebari speaks during a news conference in Erbil, Iraq, September 22, 2016. REUTERS/Azad Lashkari

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

The Federal Reserve Building stands in Washington April 3, 2012. REUTERS/Joshua Roberts/File Photo

Gabriel George of the Tsleil-Waututh Nation is pictured during the signing of the Treaty Alliance Against Tar Sands Expansion during an announcement on oil sands pipelines, with special relevance for the Kinder Morgan and Northern Gateway proposals, at the Musqueam Community Centre in Vancouver, British Columbia, Canada, September 22, 2016. REUTERS/Ben Nelms

A First Nations signs the Treaty Alliance Against Tar Sands Expansion with other First Nations leaders during an announcement on oil sands pipelines, with special relevance for the Kinder Morgan and Northern Gateway proposals, at the Musqueam Community Centre in Vancouver, British Columbia, Canada, September 22, 2016. REUTERS/Ben Nelms

Grand Chief Stewart Phillip speaks to First Nations leader before signing the Treaty Alliance Against Tar Sands Expansion during an announcement on oil sands pipelines, with special relevance for the Kinder Morgan and Northern Gateway proposals, at the Musqueam Community Centre in Vancouver, British Columbia, Canada, September 22, 2016. REUTERS/Ben Nelms

Grand Chief Stewart Phillip speaks to First Nations leader before signing the Treaty Alliance Against Tar Sands Expansion during an announcement on oil sands pipelines, with special relevance for the Kinder Morgan and Northern Gateway proposals, at the Musqueam Community Centre in Vancouver, British Columbia, Canada, September 22, 2016. REUTERS/Ben Nelms

Grand Chief Stewart Phillip signs the Treaty Alliance Against Tar Sands Expansion with other First Nations leaders during an announcement on oil sands pipelines, with special relevance for the Kinder Morgan and Northern Gateway proposals, at the Musqueam Community Centre in Vancouver, British Columbia, Canada, September 22, 2016. REUTERS/Ben Nelms