Robert called to report that the final acclimatization exercise is postponed for today. The camp has received 5'' of new snow. The experts say it is better to wait a day, so that is exactly what Robert's group is doing. This will give his sore knee another day to recover.
Weather on Everest can be a real challenge so there are extra days built into the expedition plan to accommodate for the unexpected. Hopefully there won't be any other weather delays on this trip.