Simplify the following text for a Grade 9 native English-speaking person.
Original: The Centers for Disease Control and Prevention regard F. tularensis as a viable bioweapons agent , and it has been included in the biological warfare programs of the USA , USSR and Japan at various times .
Simplified: tularensis could possibly be a bioweapons agent . For this reason , it has been included in the biological warfare programs of the USA , USSR and Japan at various times .