As the centennial of Lyndon Johnson's birth approaches, historian Robert A. Caro would like to think of his longtime subject at his happiest and most fulfilled.

That wasn't when Johnson was president, in anguish over Vietnam, but rather a few years before. That's when LBJ was in his glory as Senate majority leader -- a one-man legislative machine.

Carol's a Pulitzer Prize-winner now in the middle of writing his fourth and final volume on Johnson's life, which will cover his vice presidency and presidency. He says he wants to remember LBJ "in his days of just undiluted glory,