the first ever pig to human transplant. >> xenotransplantation is using a nonhuman organ and transplanting it into a human. >> the genetically engineered was attached for 54 hours to a deceased donor who was kept on life support. >> the transplant went really well. in fact the kidney behaved and looked just like a human kidney. >> a major test of whether zeno transplanting organs may be a solution to the prices. >> what was the key to genetically engineering the pig kidney so the human recipient would not reject it. >> we knocked out a particular gene that has been lost during evolution from pig to man. so we can invert rejection. >> this is personal for montgomery who was just 15 but