Many Alaskans were surprised and confused about a mysterious balloon that was floating at high altitudes over our state. Alaska's News Source learned on Tuesday the balloon is developed by Aerostar, a company out of Sioux Falls, Douth Dakota and is a part of a defense exercise happening at JBER. On Wednesday, Chief Meteorologist Melissa Frey spoke with Russ Vanderwerff, Vice President of Stratospheric Solutions at Aerostar to learn more.