The man is currently gaffing his way across Europe, mistaking Portugal for Poland and ensuring that the world well understands why his candidacy for president in 2016 will not survive New Hampshire.
Everybody in America (except for Biden himself) already knows this, of course.
But never let it be said that Mr. Biden doesn't serve a useful purpose. He is far, far better anti-assassination insurance for President Obama than the Secret Service will ever be. On the other hand, al Queda did try to organize a plot against the president's life at one point with the precise intention of making Biden president, so I guess that cuts both ways.