Eyes and Ears in the Sky: USAF Reconnaissance in Southeast Asia Knowing an enemy's location, activities, intentions and resources has always been important for successful military operations. In the Southeast Asia War, the U.S. Air Force kept a close watch on the enemy and provided critical intelligence through aerial photography and intercepting enemy signals. The USAF also operated a wide variety of reconnaissance aircraft in Southeast Asia, from slow World War II-era C-47s to exotic U-2s and SR-71s. Click on the following links to learn more about USAF reconnaissance during the Southeast Asia War. Early USAF Reconnaissance in Southeast Asia Photo-reconnaissance: Alone, Unarmed and Unafraid Planes without Pilots: SAC Remotely Piloted Aircraft (RPA) War over Radio Waves: Signals Intelligence Click here to return to North Vietnam: Rolling Thunder Overview. Find Out More Related Fact Sheets Douglas C-47D Skytrain Lockheed U-2A Lockheed SR-71A Note: The appearance of hyperlinks does not constitute endorsement by the National Museum of the USAF, the U.S. Air Force, or the Department of Defense, of the external website, or the information, products or services contained therein.