Clock ticking on marathon mark

Kenyan champ says two-hour barrier definitely within reach

The world's fastest long-distance runner believes it's only a matter of time before an athlete cracks the two-hour barrier in a marathon race.

Ever since Kenya's Eliud Kipchoge smashed the record by more than a minute, finishing in an astonishing 2:01:39 in Berlin on Sept 16, the athletics world has been wondering how much faster a human can run the 42-kilometer course.