The Defense Department should -- and could -- cut in half the time it takes to field major systems, according to an influential group of senior advisers. "Major systems are fielded with obsolete technology and unnecessarily high cost," the Defense Science Board says in a just-released report on technology in the 21st century. "Delay encourages 'requirements creep,' leading to further delay. Opportunities to exploit disruptive and other technologies are missed." Moreover, the authors state, the Pentagon and the defense industry...