Uber reportedly will sell its flying taxi business to secretive startup Joby Aviation - The Verge

https://www-theverge-com.cdn.ampproject.org/c/s/www.theverge.com/platform/amp/2020/12/2/22086597/uber-sells-flying-taxi-elevate-joby-aviation 

Perla Project: Surfing the mountain wave

https://www.aerosociety.com/news/surfing-the-mountain-wave/#:~:text=In%20conditions%20where%20the%20stratospheric,way%20beyond%20normal%20mountain%20waves.