US President Barack Obama shakes hands with comedian Mel Brooks as he presents him with the 2015 National Medal of Arts during a ceremony in the East Room of the White House in Washington, DC, September 22, 2016. / AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty Images

Comedian Mel Brooks jokingly falls down from the weight of the 2015 National Medal of Arts following the medal's presentation to him by US President Barack Obama during a ceremony in the East Room of the White House in Washington, DC, September 22, 2016. / AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty Images

US President Barack Obama shakes hands with comedian Mel Brooks as he presents him with the 2015 National Medal of Arts during a ceremony in the East Room of the White House in Washington, DC, September 22, 2016. / AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty Images

US President Barack Obama presents comedian Mel Brooks with the 2015 National Medal of Arts during a ceremony in the East Room of the White House in Washington, DC, September 22, 2016. / AFP PHOTO / SAUL LOEBSAUL LOEB/AFP/Getty Images

(FILES) This file photo taken on April 16, 2011 shows Brazilian Finance Minister Guido Mantega preparing to pose for the International Monetary and Financial Committee (IMFC) family phoo at the IMF/World Bank Spring meetings in Washington on April 16, 2011. Brazilian police Thursday arrested Guido Mantega, a former finance minister under presidents Lula da Silva and Dilma Rousseff, as part of the investigation into the vast Petrobras corruption scheme, media reported. / AFP PHOTO / NICHOLAS KAMMNICHOLAS KAMM/AFP/Getty Images

(FILES) This file photo taken on March 08, 2016 shows then Estonian Foreign Minister Marina Kaljurand during a bilateral meeting at the State Department in Washington, DC, on March 8, 2016. Estonia's electoral college meets on September 24, 2016 to choose a successor to two-term liberal President Toomas Hendrik Ilves after parliament failed to do so last month, with analysts insisting the race is still too close to call. Surveys suggest that Kaljurand, who recently quit as foreign minister to pursue the presidency, would win in a direct public vote in the tech savvy NATO and eurozone Baltic state of 1.3 million people. / AFP PHOTO / Jim WatsonJIM WATSON/AFP/Getty Images

First Lady Michelle Obama and President Barack Obama exit Marine One after arriving at The White House after attending the UN General Assembly in New York September 21, 2016 in Washington, DC. / AFP PHOTO / ZACH GIBSONZACH GIBSON/AFP/Getty Images

First Lady Michelle Obama and President Barack Obama arrive at The White House after attending the UN General Assembly in New York September 21, 2016 in Washington, DC. / AFP PHOTO / ZACH GIBSONZACH GIBSON/AFP/Getty Images