Both Tadesse and Wanjiru have the potential, definitely. I think if they ran in the same race at their current fitness they could take it under 59:00, simply by virtue of not running alone for most of the closing miles. I think Wanjiru would have the wheels to run away in the last 3k. It's exciting that speed has gradually become a more and more important part of world-class 13.1 and 26.2 mile racing.