TOPSHOT - Central American migrants in Piedras Negras observe the Rio Grande (also Rio Bravo), the river along the US-Mexico border that divides the cities of Piedras Negras in Mexico's Coahuila State and Eagle Pass in Texas, US, on February 17, 2019. - Acting Defence Secretary Patrick Shanahan said Saturday that no decision has been taken on funding President Donald Trump's border wall with Mexico, a project that may come partly from redirected military funds. Trump on Friday declared a national emergency to address what he called an "invasion" of drugs, gangs, human traffickers and undocumented migrants over the US border with Mexico. (Photo by Julio Cesar AGUILAR / AFP)