There's a reason that most antiquated of institutions, the British royal family, manages to survive in spite of all its problems. And the reason is that it's able to regenerate itself, regaining endangered legitimacy. Proof of its regenerative capacity is found in the willingness of Prince Charles' two sons to join the British Army during wartime. Prince William, 23, and Prince Harry, 21, stepped forward to put on their country's uniform, putting themselves in harm's way. That's good news for the House of Windsor -- and provides a lesson for other would-be dynasts.