I returned yesterday from a five day back packing trip in the Grand Canyon — 40 pound pack, from the rim to the river and back up (2000 meters) and many kilometers in between. Last year at this time I could not walk 20 meters without stopping because of the pain. I don’t believe in miracles but this sure feels like one. Thank you Professor McGill for your career work that changed my world and for your willingness to see me notwithstanding my original freeze at the starting gate. This was a most unusual kindness and act of grace.