System monitors the air and gives workers a warning. More than three years after anthrax-laced mail killed two Washington, D.C., postal workers and spread fears of bioterrorism, Houston’s main downtown facility has a new system that can detect anthrax on letters. The city’s downtown processing and distribution center on Franklin had the Biohazard Detection System, BDS, installed March 19, making it the first postal location in the state to get it. The automated system continuously collects air samples as letters move through the machinery. If anthrax is detected, workers are given a visual and audible alert. Full Story