Two brothers who worked as Border Patrol agents were sentenced to at least 30 years in prison each for smuggling hundreds of immigrants into the United States, crimes that the judge termed a threat to national security. U.S. District Court Judge John Houston sentenced Raul Villarreal on Friday to 35 years in prison for being the ring leader and ordered him to pay a $250,000 fine. His brother, Fidel Villarreal, was sentenced to 30 years for managing the illicit business. The sentences are among the longest given to border law enforcement officials for corruption.