Browse a gallery of the U.S. Air Force's high-altitude balloon experiments and the researchers, scientists, and test pilots who made them possible.

Primarily, Vulcan was intended as a high-altitude bomber capable of carrying nuclear bombs, but its role evolved over time. Thus, later served in low-level bombing and as a refueling tanker.

Traveling at high altitude can be hazardous. The information provided here is designed for educational use only and is not a substitute for specific training or experience. Princeton University and ...