sentences:  National Biodefense Analysis and Countermeasures Center
  
  The National Biodefense Analysis and Countermeasures Center (NBACC) is a government biodefense research laboratory created by the U.S. Department of Homeland Security (DHS) and located at the sprawling biodefense campus at Fort Detrick in Frederick, MD, USA.The NBACC (pronounced "EN-back") is the principal U.S. biodefense research institution engaged in laboratory-based threat assessment and bioforensics.