I'm confident that the terrorists are aware that from the curb to the cockpit we've got additional security measures that didn't exist a couple of years ago.
Of course, we should all be aware of what we're packing in our carry-on luggage - anything that might be considered dangerous could be confiscated at a security checkpoint.
I am well aware of the facts presented by numerous security experts on the many ways in which the United States' digital networks have come under siege by cybercriminals and under daily assault by hackers in league with various foreign governments.
Awareness is the greatest agent for change.
Security is mostly a superstition. It does not exist in nature.