Force Protection Condition Change

Local AF base went to FPC Charlie, no idea when or why, I was denied access to the base due to the change. Only military and dependents are allowed on base

No idea if it’s a exercise or real world change, could not find anything out and don’t see anything on line 

I’m stumped 🤷‍♂️🤷‍♂️🤷‍♂️🤷‍♂️🤷‍♂️