I have said since Sept. 12, 2001, the easiest, most effective and cheapest anti-terror measure the US could have taken would be a simple travel ban into the USA for anyone from North Africa, the Mid-east, or South Asia. It literally would have saved us $7 Trillion and thousands of dead Americans.
But people much smarter than me decided that endless wars abroad, and importing millions of Muslims into the US nanny state made much more sense.
“... the easiest, most effective and cheapest anti-terror measure the US could have taken would be a simple travel ban..”
They're hoping Hollywood will secularize them quick enough that we won't have to worry too much about terrorism.