Federal Reserve Chair Janet Yellen speaks during a press conference following the announcement that the Fed will leave rates unchanged, in Washington, DC, September 21, 2016. The Federal Reserve kept its benchmark interest rate unchanged for the sixth straight meeting Wednesday, saying it needs to see more signs of strength in the US economy. / AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty Images

Juba, SOUTH SUDAN: School girls and boys march to claim peace in the streets of Juba, South Sudan, on September 21, 2016.The march, attended by hundreds of school children and women activists, was organised by the South Sudan Peace and Reconciliation Commission, in collaboration with the National Platform for Peace and Reconciliation, as well as peace partners, national and local organizations, the United Nations, diplomatic missions, and the business community to commemorate the International Day of Peace, under the national theme Together We Can Heal the Nation.AFP PHOTO / ALBERT GONZALEZ FARRAN / AFP PHOTO / Albert Gonzalez Farran - AFP / Albert Gonzalez FarranALBERT GONZALEZ FARRAN/AFP/Getty Images

Juba, SOUTH SUDAN: School boys march to claim peace in the streets of Juba, South Sudan, on September 21, 2016.The march, attended by hundreds of school children and women activists, was organised by the South Sudan Peace and Reconciliation Commission, in collaboration with the National Platform for Peace and Reconciliation, as well as peace partners, national and local organizations, the United Nations, diplomatic missions, and the business community to commemorate the International Day of Peace, under the national theme Together We Can Heal the Nation.AFP PHOTO / ALBERT GONZALEZ FARRAN / AFP PHOTO / Albert Gonzalez Farran - AFP / Albert Gonzalez FarranALBERT GONZALEZ FARRAN/AFP/Getty Images

Juba, SOUTH SUDAN: School boys march to claim peace in the streets of Juba, South Sudan, on September 21, 2016.The march, attended by hundreds of school children and women activists, was organised by the South Sudan Peace and Reconciliation Commission, in collaboration with the National Platform for Peace and Reconciliation, as well as peace partners, national and local organizations, the United Nations, diplomatic missions, and the business community to commemorate the International Day of Peace, under the national theme Together We Can Heal the Nation.AFP PHOTO / ALBERT GONZALEZ FARRAN / AFP PHOTO / Albert Gonzalez Farran - AFP / Albert Gonzalez FarranALBERT GONZALEZ FARRAN/AFP/Getty Images

Juba, SOUTH SUDAN: School boys and girls march to claim peace in the streets of Juba, South Sudan, on September 21, 2016.The march, attended by hundreds of school children and women activists, was organised by the South Sudan Peace and Reconciliation Commission, in collaboration with the National Platform for Peace and Reconciliation, as well as peace partners, national and local organizations, the United Nations, diplomatic missions, and the business community to commemorate the International Day of Peace, under the national theme Together We Can Heal the Nation.AFP PHOTO / ALBERT GONZALEZ FARRAN / AFP PHOTO / Albert Gonzalez Farran - AFP / Albert Gonzalez FarranALBERT GONZALEZ FARRAN/AFP/Getty Images

Juba, SOUTH SUDAN: School boys and girls march to claim peace in the streets of Juba, South Sudan, on September 21, 2016.The march, attended by hundreds of school children and women activists, was organised by the South Sudan Peace and Reconciliation Commission, in collaboration with the National Platform for Peace and Reconciliation, as well as peace partners, national and local organizations, the United Nations, diplomatic missions, and the business community to commemorate the International Day of Peace, under the national theme Together We Can Heal the Nation.AFP PHOTO / ALBERT GONZALEZ FARRAN / AFP PHOTO / Albert Gonzalez Farran - AFP / Albert Gonzalez FarranALBERT GONZALEZ FARRAN/AFP/Getty Images

People walk on a street in Buenos Aires' financial district, Argentina, June 2, 2016. REUTERS/Marcos Brindicci

TOPSHOT - Nigerian President Muhammadu Buhari leaves the stage during the US-Africa Business Forum in New York on September 21, 2016. / AFP PHOTO / JIM WATSONJIM WATSON/AFP/Getty Images