From a FP email:
He was first arrested in Turkey last month and was then detained by American officials during a stopover in Jordan after Turkish authorities deported him to Kuwait.
I am sure FP is wrong on the US role in Jordan; detained by the Jordanians under the existing extradition agreement and once that process was completed onto a flight to NYC. Looks like some deft diplomacy and LE coordination.

Link via FP:http://www.nytimes.com/2013/03/08/wo...kkgEfhNLiwpxoQ

Intelligence officials have long debated how the group of operatives — several who are members of Al Qaeda’s “shura council” — has been treated inside Iran, and his trial could shed light on its members’ lives there. Some officials described them as being under a kind of house arrest, and point out that Iran — a country run by a Shiite Muslim theocracy — would be wary of any alliance with Al Qaeda, a Sunni terrorist network. Others believe that Iran might at least be using the group to keep open communication channels with senior Qaeda leaders in Pakistan.
NYT notes several trials are now due in NYC; well I'll wait till they do appear in court.