A couple things. These things happen almost always during or immediately following a drill. This establishes to me that these aren't organic, native events, but carefully coordinated false flag attacks. There are institutions and agencies that are conducting these attacks, and there is proof of their culpability.
To stop terrorism, end the system that creates them, look at who creates them. Al Qaeda, and all it's offshoots, like ISIS, was created by George H.W. Bush, serving as head of the CIA under Jimmy Carter. That's where the terrorists come from, that's who staffs, trains, and pays them.
End it.
In the meantime, remember the Texas church attack only a few months ago? It was stopped by an armed citizen, who killed the terrorist. Stop the terrorists when they attack. This means having a gun.
Arm yourself, and everyone you want protected.
The CIA is our enemy, and guns are our friends.
"Almost always" and "carefully coordinated" are not synonymous with one another.