In the fall of 2008, Andrew Olivieri felt like he was staring down four years of uncertainty, dissatisfaction and "wasting my parents' money." A senior at the Bronx High School of Science, where most graduates are expected to attend college, Olivieri just didn’t feel ready. But the Army life had always attracted him, as a path that led to maturity, a work ethic, and an opportunity to be part of something larger than himself. "I wanted to be a part of history, and contribute to it," Olivieri said. "I never wanted to be one of those people who just say,…