Ronald Reagan is shot by John W. Hinckley Jr.of Evergreen, Colorado, undergoes 2 hour operation to remove a single bullet in his left lung. He is in stable condition; full recovery is expected. Experts (Robert Steele, Eleanor Clift, James King) disagree whether security has gotten lax since Johnson and Nixon presidencies, after the Kennedy assassination. How can security be improved, given the political realities and available technologies?