Drivers in a southeastern Pennsylvania town were forced off a local street and into a parking lot, so a federal contractor – aided by local police --could quiz them about their road habits and ask for a cheek swab, in a replay of an incident last month in Texas. The checkpoint, in downtown Reading, was one of several conducted by the Pacific Institute for Research and Evaluation, which was hired by the National Highway Traffic Safety Administration and the White House Office of National Drug Control Policy. Although the questioning and cheek swab were voluntary, local residents said they were...