By Obed Manuel and Maria Mendez, The Dallas Morning News (TNS) DALLAS — Emma Chalott Barron remembers June 15, 2012. She huddled around the TV that day with her parents and watched as President Barack Obama announced the creation of Deferred Action for Childhood Arrivals, a program that would change hundreds of thousands of lives. Chalott Barron, then 14, didn’t understand the technical aspects of