Consider that ISIS has manpads like Stingers.
Then consider the relative ease things can be smuggled in from Mexico into the US.
Then consider how easy it would be for an ISIS operative to park a car in a parking lot or a highway near the end of a runway at a commercial airport, and shoot down a jet with a manpad as it takes off.
Now imagine a day where there are 20 or 30 ISIS people, at different airports with manpads, shooting down several planes within a 10 minute window.
That would probably be the day when air travel essentially ends in the US.
What are “manpads” ? Are they something for the knees? Thank-you for your response.