High-Altitude Balloon Innovation | American Experience | Official Site | PBS
US Army floats the option of fielding high-altitude balloons
Army turns to high-altitude balloons for more eyes in the skies | Stars and Stripes
Soon to be detected but not easily intercepted: how high-altitude balloons highlight the challenges and opportunities of the 20-50km range - Starburst
High-altitude balloon - Wikipedia
Michael Sheetz on X: "High-altitude balloon tourism company Space Perspective raises $40 million in a round led by Prime Movers Lab. The company aims to begin carrying passengers by late 2024, and
New satellite design team IrishSat launches its first high-altitude balloon - College of Engineering
Space tourism could soon include high altitude hot air balloons | Popular Science