This is the emotional moment a dad was reunited with his adoptive daughter after he donated part of his liver to save her life.<br /><br />Peter McKay, 38, was moved to tears as he watched over baby Darcy hours after a portion of his vital organ was transplanted into the sick tot.<br /><br />Darcy had been battling progressive familial intrahepatic cholestasis type 2, or PFIC2, which prevents liver cells from flushing out bile, forcing it into the bloodstream.
