The current world-record holder in the women's marathon weighs in.
At 39, "The Emperor" continues to race.
Haile Gebrselassie and Paula Radcliffe have accomplished enough to retire, but if they want to keep going, why not?
The marathon world-record holder isn't sure if her career is over.
The Big Apple knows how to put on a road show.
She says retirement is not an option now.
The 2005 World Champion refuses to quit.
Jamaican sprinter Usain Bolt leads the way.
The 2:28 debutante is ready to step in and race next Sunday's Olympic Marathon.
The marathon world-record holder has been hampered by a foot injury.