Repatriation flight program
The Repatriation flight program , officially named "Interior Repatriation Program" , was a United States and Mexico government program destined to fly back Mexican citizens who had illegally crossed the frontier between the United States and Mexico to their home country for free . 
<triplet> United States <subj> Mexico <obj> shares border with <triplet> Mexico <subj> United States <obj> shares border with