Special report: Defense R&D.

• Position: Next Month

Army

* In the Army's operating concept, leaders say that the service faces an uncertain future with many unknown variables, from the enemy to the location of the battlefield. What will be needed to counter this threat is a slew of new cutting edge technologies to give soldier an advantage. In our November issue, National Defense delves into the Army's top research and development needs--from new, more efficient power sources, to tougher trucks, to faster helicopters to stronger armor.

Air Force

* The U.S. Air Force is facing increased competition in the three domains in which it operates: air, space and cyber space. It has a reputation of producing some the most cutting edge technologies of modern warfare, but potential adversaries are making gains, eating away at its tactical advantages. National Defense in its annual research and development issue looks at the Air Force's top five R&D priorities in...