Getting to the top ain't easy. Staying there, well that's even harder.
The following four American track and field champions have been tasked with the latter entering the 2012 London Olympics.
Each member of this vaunted quarter won a gold medal in Beijing and each has earned a return trip to the Olympic Games.
Now, a quick look at their chances of renewed glory this summer and the obstacles (physical, psychological and wooden) that lay in their respective paths...