By RON NIXON and MICHAEL D. SHEAR FEB. 21, 2017 Mexicans deported from the U.S. walked to a repatriation center in Tijuana in June 2016.CreditGuillermo Arias/Agence France-Presse — Getty Images WASHINGTON — The Department of Homeland Security on Tuesday released a set of documents translating President Trump’s executive orders on immigration and border security into policy, … More