Mike called from Camp IV to say he reached the summit at 1:30 p.m. on 5/22. His oxygen delivery wasn’t working correctly so it took him longer than expected to reach the summit. He was alone on the summit and as he came down by himself he missed a turn and was out all night [edit: I thought I might have been off route, but I wasn’t]. As a consequence he has some frostbite. Sherpas will help him get back to base camp. He will finally get to remove his boots once he reaches the medical tent and they can determine how much damage there is from the frost bite. As this point it is important for him to descend as soon as possible.