Mounting budget pressures could trigger the most difficult investment decisions ever taken in a Quadrennial Defense Review, according to a senior Pentagon official. The review will also be unlike previous assessments in that it will produce not just a single report, but also a series of follow-on defense assessments. "This promises to be different from other reviews," said Ryan Henry, principal deputy under secretary of defense for policy. Henry, a key overseer of the assessment, this week offered the most...