Cooper Lutkenhaus, 16, tries to shock the running world again

All the racers in the men’s 800 meters at track and field’s world championships in Tokyo this week share a few qualities. Each is lithe but strong. And each possesses the high-tech spikes and huge aerobic capacity that, over the past year, have combined to make this history’s fastest era of half-mile racing. There is, however, one outlier: Cooper Lutkenhaus, who’ll be missing his English literature class to be there. By any reasonable expectation, Cooper Lutkenhaus should not h