B-52 STRATOFORTRESS (IMAGE) Southwest Research Institute Caption Southwest Research Institute has received a new contract to help the U.S. Air Force sustain the structural integrity of the B-52 Stratofortress, a strategic heavy bomber manufactured in the 1950s. Credit United States Air Force Usage Restrictions Images/Videos may be used by the public for educational and informational purposes only. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.