A memorial site in Manhattan, where Robyn Hightman, a bike messenger was hit and killed by a truck this summer. People have tucked messages of support in the spokes of a bike wheel.

A memorial site in Manhattan, where Robyn Hightman, a bike messenger was hit and killed by a truck this summer. People have tucked messages of support in the spokes of a bike wheel.

A memorial site in Manhattan, where Robyn Hightman, a bike messenger was hit and killed by a truck this summer. People have tucked messages of support in the spokes of a bike wheel.

A memorial site in Manhattan, where Robyn Hightman, a bike messenger was hit and killed by a truck this summer. People have tucked messages of support in the spokes of a bike wheel.