More than a decade after the Department of Homeland Security began a program to fight biological terrorism, “considerable uncertainty” remains over whether the system can reliably detect biological threats, a new federal audit says.

The report by the U.S. Government Accountability Office is the latest blow to DHS’s BioWatch system, the agency’s marquee post-Sept. 11, 2001, effort to detect pathogens that could signal a devastating biological attack. After scientific studies and media reports raised concern about BioWatch’s effectiveness, DHS last year canceled the system’s planned next generation of sensors.

Read the article “DHS Program to Detect Bio-Threats May Not Be Able to Detect Bio-Threats, Auditors Say” on washingtonpost.com.