well there's a good point for discussion.... is it more impressive to be world class at 1500 and 5000 than it is at 5000 and 10,000 ? We act like it is but is it really ? It just has happened less often, maybe that's all. The Woolworth double has always been quite common but not the others except of course the 100/200. But it's the Snells at 800/1500 and the Johnsons and Smiths at 200/400 that grab us.. maybe too much ? Same thing with King Carl at LJ/Sprints. He and Owens the only ones to pull that off.