In the morning we scrambled up the worst scree field (it's always the worst, isn't it?) I've ever walked a haul bag on, to the base of Perestroika Crack. The wall towered over us, cavern like, for several thousand feet, and we were soon exposed to winds that made standing on the approach slab difficult. We could see the shade line inching down the walls on the west side of the valley, but it would be hours before the sun would make it to us. The thought of climbing out of a bivy, high on the wall, in these conditions, was not pleasant. We decided to wait for the wind to die down, and when it refused after a couple of hours, we retreated back to the Ak-Su River, and hiked back to the Kara-Su that day.