Families separated by their immigration status sloshed through a muddy trickle of the Rio Grande on Wednesday to embrace at the border between the United States and Mexico. Their reunion was a momentary truce organized by immigrant advocates and supervised by the Border Patrol. Families who came from the United States wore blue T-shirts and their relatives from Mexico wore white T-shirts. They met in the middle of a concrete canal between the border cities of El Paso and Ciudad Juárez. Francisco Luevano squeezed his mother to his chest for the first time in 15 years. Luevano is an undocumented hotel maintenance worker who lives in Las Cruces, New Mexico. His mother traveled 700 miles from central Mexico to see him for a fleeting three minutes.