Pascale Ferrier faces additional charges of sending threats through the mail and violating biological weapons prohibitions. She pleaded not guilty in a Washington, D.C., court.

Exercise Precise Response 2016 at Canadian Forces Base Suffield in southeastern Alberta isn't about high-tech military equipment or heavily armed soldiers. It is focusing on chemical, biological, radiological and explosive material.

With France still reeling from last week's deadly attacks in Paris, Prime Minister Manuel Valls warned Thursday that Islamic extremists might at some point use chemical or biological weapons.