yes, terrorists can be internal -------- but, they can also be...

yes, terrorists can be internal -------- but, they can also be flying in from somewhere else

you can't check what's in a plane until it lands. You can try, by having agents in foreign lands - but, the reality is -------- that's very difficult.

These days - there are so many weapons that can create havoc that can be brought in by plane or ship.

Imagine a container full of those drones which devastated the Russian air force recently - imagine letting a truckload of them loose

All America has really done is to make MORE enemies --------- as if it didn't have enough already.

One cannot have fences and fortifications strong enough if half the world hates you - they WILL get through

as Israel is currently finding out - even with it's iron dome thingy ------- 'only 5% get through'

imagine 5% dropping on New York ------------- hmmmmm