The recent arrest of a Valencia man who, the FBI claims, planned to carry out an ISIS-inspired mass casualty attack drives home the point terrorism has become a new part of American reality.

Looking back at the past week, we find ourselves grateful the man’s plan was caught before the attack because officials acted and because someone spoke up with concern.

No longer are threats confined to car bombs and suicide attacks in distant lands, the United States faces a multiplying number of threats caused by new technologies, such as drones and the weaponization of social media to radicalize disaffected American citizens to join extremist causes.

This appears to be what happened in the case of the Valencia suspect, the FBI detailed in a criminal complaint. Prosecutors claim the man, Jonathan Hunter Kramer, used an online alias “Hamza Al Rashid” to pledge allegiance to ISIS and shared extremist propaganda.

That a 21-year-old man in Western Pennsylvania allegedly was willing to take up the cause of terrorist organization created in Iraq and dedicated to establishing an Islamic caliphate should give everyone cause for concern.

While there are ways to combat terrorism threats — watch lists, surveillance of suspected potential terrorists, monitoring cyber activities — some of these measures seem uncomfortably close to a police state to many Americans.

We all seem quite aware of the Flock cameras around us. But are we aware of the risks around us, too? Are we paying attention to what’s around us? Are we speaking up when we see something suspicious?

Ordinary Americans during their everyday lives must be more alert to suspicious activities and individuals.

The “See Something, Say Something” campaign emphasizes reporting suspicious actions or situations, such as a break-in at a restricted area or a package left unattended in a public place.

It has been reported a tipster alerted authorities to the Valencia man’s online activities.

Threats to the United States are constantly evolving, but increased vigilance on the part of everyone might be the most effective counter.

How are you paying attention and will you say something when you see something?

Anyone who knows someone who is engaged in suspicious activity requiring chemicals or other weapons to cause harm was told to call 1-800-CALL-FBI at a news conference last week.

— EF & TL