Why are there always military drills that correspond with terror attacks?

Question

7/7 London bombings had military drills going on and the person running the drills went public and admitted it once on tv and then again on BBC radio

OK City had terror drills going on at the time of the (multiple) bombing

The FBI was running a drill in the first WTC bombing of '93

Of course we all know about "is this real world or excercise?" But there were also 30 different terror drills spanning across multiple government agencies.

Why does this strange phenomenom of terror attacks and military excercises occur?

Answer 1

Especially in large cities, there are drills of one sort or another going on pretty often.

The hospital I work at recently had a drill in what to do in case of a child abduction, that doesn't mean the hospital was complicit in any child abductions that day.

Answer 2

We run drills for a lot more than terror attacks routinely.  The saying is train as you would fight.  If you've not seen it before, it can be harder to respond.

So, people on nuke alert practice launching their weapons.  Aircrews practice dropping weapons or refueling or navigation.  They also practice emergency situations so they know how to act.  Soldiers and marines practice shooting, infiltration, egress, etc.

There will be terror exercises until we don't have to worry about terrorists attacking us again.