And it will be very hard to charge him. Some of the actual 19 terrorists supposedly did not know what was going on. I highly doubt a person outside of the 19 would if that is in fact true.
From the article- and is being held in New York on a federal charge of unlawful possession of more than 15 credit cards,
Seems that they could get him on something here, then deport him, then put him on a do not fly/do not admit list and he can enjoy himself in some ME hellhole.
The 19 may not have known exactly what was intended, but they knew they were being sent to do something illegal. So if you willingly participate in something, even if you don't know what it is, you are equally guilty.