It was mid-morning in Plano, TX, when the non-descript white van pulled up to the curb in front of a popular playground. A young woman, dressed in worn jeans and a tattered sweatshirt, and accompanied by a small child, looked furtively from side to side, before walking swiftly to the van and climbing inside.

Half an hour later, the same van pulled up in front of a busy community center. This time the woman, dressed in a tailored pants suit, was sitting on a bench in a small garden to one side of the building. She also climbed quickly into the van.

Finally, the van pulled up in front of a crowded discount mall. Another woman, this one dressed in a business suit, emerged from the mall entrance and quickly climbed into the van.

The van pulled away from the mall, carefully merged into traffic, and quickly disappeared down the highway.