Whether she's walking the halls at Hillcrest High School in Dallas, or catching up with the other athletes on the basketball court, Andrea Tchinda exudes star quality. Wednesday was her first time back on campus since the graduating senior found out she was named valedictorian. Proud principal T.J. Florie called to give her the news. "It was just a moment that made me emotional," Florie said. "That means a lot for somebody that looks like her to look up to her and say, ‘She can do this, I can do this.’" It's another crowning achievement for a girl who was...