For the military, deciding where to invest its precious research-and-development dollars can have huge consequences. Prognosticators look out decades in advance to determine what kinds of threats the armed forces will have to face. It also requires a keen understanding of where science is going and what technologies have the potential to make an impact on tomorrow’s battlefields. National Defense Magazine in its 10th annual research-and-development report looks at the fields where the four services’ are placing their R&D bets. Listen to this month's podcast here.