A previously unreleased study by Army scientists finds the service is lagging a quarter-century behind the aerospace and automotive industries in advancing the use of lightweight materials for its vehicles. The conclusion comes as Army leaders continue to stress the goal of making service platforms lighter, while maintaining adequate protection levels, so that ground forces can deploy more quickly and adapt to fast-moving guerrilla tactics expected in future wars. But amid the talk, the October 2014 report, made available to...