&gt;as a way to hide experimental aircraft testing.<p>even today it looks cool <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=XJARrc40imk" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=XJARrc40imk</a> , <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=cmPiZv4q4Ms" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=cmPiZv4q4Ms</a>