[Jyotishi]

9,800 feet. Did China steal helicopter technology from the U.S.?

[mylife]

Try 16k-18K feet.

[mylife]

Leh sits at almost 12K ft

[Jack Hydrazine]

GIVING EVEREST THE BIRD
The arrival of high-altitude helicopters on Mount ­Everest and other Nepalese peaks has transformed search-and-­rescue and saved lives. But the choppers have also ­added to the chaos at the top of the world—and introduced a deadly new brand of danger.
http://www.outsideonline.com/outdoor-adventure/climbing/mountaineering/Giving-Everest-the-Bird.html