The ever watchful eye of Maryanne Daniel making sure the walkers stayed within the definition of race walking.
As Trevor dominates the field, the strain of the pace begins to show.
The strain on John Nunn's hamstring was too great to risk continuing given his upcoming 50K in London. Nunn called it quits early, hoping to reduce the risk of further injury.
Unfortunately, Joshua Wiseman also ended his day early, but for a different reason. He received his third red card and was disqualified.
The men's 20K story continues...