>>1339799>>1340043Ueli Steck soloed the Eiger north face in just over 2 hours:
https://www.youtube.com/watch?v=NfpYNr7es0YK2 is not hard because it's remote, it's hard because of the extreme altitude, unpredictable weather, and avalanche/rockfall danger
>>1338916did your friend use oxygen on K2?