She says she's fitter than she was last year.
He came to the race hungry to take down Ryan Hall's five-year-old mark.
He shaved seven minutes off the old course record.
The race attracted nearly 1,600 runners from 45 different states on picture-perfect day.
He bettered the mark by four seconds.
She also beat the second-place finisher by nearly three minutes.
If conditions hold, runners will have the breeze to their backs.
The majority of the elite runners are from Ethiopia.
Aggressive start helps Kenyan to course record.
He made the final move with 200 meters to go.