U-Haul

Three parts. Alan C. Miller and Myron Levin: MARISSA STERNBERG sits in her wheelchair, barely able to move or speak. Caregivers are always at her side. Progress is measured in tiny steps: an unclenched fist, a look of recognition, a smile for her father.

Nearly four years ago, Sternberg was a high-spirited 19-year-old bound for veterinary school in Denver. She rented a U-Haul trailer to move her belongings, hitched it to her Toyota Land Cruiser and hit the road with her two dogs and a friend.

That evening, as the Land Cruiser descended a hill in the Chihuahuan Desert of New Mexico, the trailer began to swing from side to side, pushing the SUV as if trying to muscle it off the road.