How does this sound for a challenge: finish 70% of a 2,900 mile greenway connecting Canada to Key West. That's the mission of Dennis Markatos-Soriano and his staff. Each day, as the trail comes together, piece by piece, it provides a car-free path for many of us to bike, walk, jog, or skate; to work, work-out, or play. It gets us out of the house, out of our cars, and into a more healthy life style.