Augmented reality. Aaron Gardony (pictured here) uses hand gestures to interact with a 3-D model of a city. Gardony is a research psychologist on the Cognitive Science Team at the Natick Soldier Research, Development and Engineering Center. NSRDEC is investigating how augmented reality, or AR, may help Soldiers improve their mission-planning skills. Courtesy of US Army Night Vision and Electronic Sensors Directorate; photo credit: Aaron Gardony, NSRDEC Cognitive Science Team