CASEY taking aid.

CASEY continues to press.

GARCÍA LEÓN refueling and a step ahead of ZDZIEBŁO.

ZDZIEBŁO was showing no signs that she was even working out hard.

GARCÍA LEÓN made it look equally easy.

QIEYANG completed the trio giving us a clinic on effortless walking.

MICHTA-COFFEY appeared to be in a bit more distress, but still walking strong.

Hmmm, this does not look like someone straining, but enjoying what will probably be her last World Championships performance.

No one in the main trailing pack seemed to want to make a major move.

ZDZIEBŁO couldn't shake her shadow.

GARCÍA LEÓN was on her like glue.

Even without the hot sun, the athletes all seemed to know the importance of refueling and doing so before it was too late.

MELVILLE approaching the 20km mark was still ~20 seconds ahead of CASEY and walking solidly.

Was GONZÁLEZ ready to break the pack and pull away?

Not if Antigoni NTRISMPIOTI (Greece) and Serena SONODA (Japan) had anything to say about it.

Viviane LYRA of Brazil was also in the mix.

CASEY clocked off the kilometers on pace for a PR.

BURZALOVÁ also made it look easy.

Aura Libertad MORALES of Mexico.

Elianay PEREIRA of Brazil