In rural eastern Colorado, pole vaulters thrive under watchful eye of coach Jack Lubbers
On a warm summer evening on the high plains in Yuma, Colo., Jack Lubbers stands on a grassy field and carefully studies the movements of pole vaulters.
On a warm summer evening on the high plains in Yuma, Colo., Jack Lubbers stands on a grassy field and carefully studies the movements of pole vaulters.
