In this photo provided by the Herrick familly, Ron Herrick pushes his twin brother, Richard, in a wheel chair, Jan. 30, 1955, as they leave Peter Bent Brigham Hospital in Boston, Mass., following the first sucessful organ transplant. Ron donated a kidney to Richard who suffered from chronic nephritis, an inflamation of the kidneys. More than 400,000 transplants have been performed in the United States since the first successful one 50-years ago, when Ronald Herrick wasn't thinking about making medical history that would one day lead to saving countless lives, he just wanted to save one life, his brother's.(AP Photo)