Stepping out of his car to the welcoming sounds of a serenading mariachi, Lieutenant General Ricardo S. Sanchez entered the United South High School library Wednesday for a private evening reception honoring the Army's highest ranking Hispanic. Dressed in casual civilian clothes, and making the rounds to warmly greet each of the nearly 100 veterans, teachers, students and community members who turned out to see him, it was hard to imagine that this was the man who headed more than 130,000 American troops and coalition forces in Iraq. The Rio Grande City native was reassigned last summer to Heidelberg, Germany,...