Given the fact that more than 50 years since the first sub-four-minute mile, we still celebrate an athlete's first time under that barrier, Don's achievement remains remarkable,

At a personal level, when I moved from the 1/2 mile to the mile as a college junior, I used the experiences and stories of those milers who came before me for education and inspiration. Don, too, moved from the 1/2 mile to the mile in college, and his 3:58.7, which made him the third-fastest miler ever when he ran it, was remarkable in part because he ran it on the same day that he took a final exam in Berkeley. For an athlete like myself, who aspired to be a student and an athlete throughout my career, Don was and is a true role model.

That package is very impressive. No one advised them. They put it together. They thought about what the sport needed and what contribution they could make.

Allyson and Justin showed the world that the United States is stronger than ever in the sprints.

The average age of the gold medalists is 23.5 so when you're thinking about moving forward to Beijing and Osaka before that, you have to feel pretty good about that.

Allyson and Justin showed the world that the United States is stronger than ever in the sprints,