Yes, we were. And I remember who did the telling.
You weren't waiting for a retraction, were you?
I said that, as did others, and it's still one of the many designed functions of the extension.
"...and that it couldn't be exploited by terrorists?"
I didn't say that, but there's little that couldn't be exploited by terrorists, including a Visa for a homicide bomber and his family to go visit the Mouse in Orlando.
Face it, a terrorist could enter the nation as part of a visiting orchestra, to visit family, conduct a legitimate business transaction...any reason.