The rotor wash from the chinooks is pretty amazing. I have a picture somewhere taken from 17k on Denali looking down at the 14k camp when a chinook landed to pick up and injured climber. I'll see if I can dig it up.
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I am still not a cop.

EZ Thread Yarn Balls

"I don't care how you catch them, as long as you treat them well and with respect." Lani Waller in "A Steelheader's Way."