We were "watching" him.
So where is the point where "watching" a terrorist - and he is a terrorist, isn't he - and prohibiting him free access to air/rail/ship/motor vehicle travel for entry into the USA comes into play?
Anyone with Al-Qaeda ties are terrorists, yes? (Am I wrong?) "THEY" KNEW HE WAS AN AL-QAEDA SYMPATHIZER. WHY DID HE SLIP THROUGH, AND I HAVE TO HAVE EVERYTHING SEARCHED, INCLUDING MY SHOES, AND ONE TIME, TAKEN ASIDE AND WANDED BECAUSE I FORGOT I WAS WEARING A HEAVY SILVER BRACELET UNDER A LONG SLEEVED SHIRT?
HOMELAND SECURITY IS A MISNOMER. HOMELAND INSECURITY IS MORE LIKE IT.