Muhammad Ali twice defended his heavyweight boxing title at the old Capital Centre arena in Landover, Maryland. You're not likely to see either his April 30,1976 fight against Jimmy Young nor his May 15, 1977 bout with Alfredo Evangelista, both of which he won by unanimous decision, on highlight reels of Ali's greatest fights. Nevertheless, they gave Washingtonians a chance to catch an up-close look at "The Greatest," a larger-than-life athlete whose unconventional style and sublime physical grace was matched by his irrepressible talent for hyperbole and outrageous self-promotion.