People walk past billboards showing the price of the Mexican peso against the U.S. dollar, in an exchange house at the International Airport of Mexico City, capital of Mexico, Jan. 20, 2017. One U.S. dollar was sold up to 23 Mexican pesos at the airport, prior to Donald Trump's inauguration as the U.S. president on Friday. (Xinhua/Hector Alfaro/ObturadorMX)