The iron soldier.(exoskeleton for brain surgical treatment)

Trevor Greene has a new tattoo on his left forearm. It appears to show a rugged mountain peak and, above it, a string of letters I can't decipher. It's mid-June, an exciting morning for the forcibly retired Army Reserve captain, his wife, Debbie, and a cast of characters who crowd the main floor of the Greene family home in Nanaimo, B.C. Greene, in his wheelchair, is sharing the focus of attention with a silent partner sitting nearby, something that looks eerily like a headless robot. The Greenes, in ways they couldn't possibly have foreseen, have been building to this moment for more than nine years, really, since the aftermath of March 4, 2006, the day Capt. Greene first did the impossible by refusing to die in the dust of a remote Afghan settlement.