Breakthroughs in information technology, nanotechnology and the biological and neurological sciences are likely to significantly improve the capabilities of individual troops in the next 20 years, a defense official said this week. Work in these fields is aimed at helping soldiers improve their performance in battle by enhancing their hearing, vision and decision-making abilities, according to Joe Purser, who heads the "Deep Futures" department at U.S. Joint Forces Command. "You marry that with advanced materials, and Arnold Schwarzenegger is not...