Following is a transcript of the video. In the early 1950s, US planes were conducting low-flying recon missions over the USSR. But there were constant worries of them being spotted and shot down.

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 ...

The Grade 10 student at Blackville School, about 150 kilometres north of Moncton, has been working with classmate Nick Hallihan to create a high-altitude ... said the animation took about three ...

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.

In the years since then, balloon flight technology has evolved from cloth balloons and open baskets to polyethylene balloons and metal pressurized gondolas that allow for high-altitude atmospheric ...