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Greg Bernhardt

The REAL Physics of Hot Air Balloons!

This episode is brought to you by Dropbox https://www.dropbox.com/ Tweet ⇒ http://bit.ly/OKTBShotair Share on FB ⇒ http://bit.ly/OKTBShotairFB ↓ More info an...

Greg Bernhardt, Mar 6, 2017
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