Iran & AQ: a safe haven or holding cell?

[davidbfpo]

A curious paragraph in The Soufan Group's commentary on the recent Executive Order on restricting immigration, with my emphasis:

However, Iran is materially different from the other countries named in the executive order. The restriction is primarily intended to prevent terrorists linked to the so-called Islamic State and al-Qaeda from entering the U.S. Iran has identified both groups as threats to Iranian national security and has provided military support to the governments of Iraq and Syria to battle them and related Sunni jihadist organizations. Though it did allow some aides to Usama bin Ladin to take refuge in Iran after the September 11 attacks—possibly as leverage against Saudi Arabia, its main regional adversary—Iran kept them under virtual house arrest and eventually expelled nearly all of them.

Link:http://soufangroup.com/tsg-intelbrie...s-aim-at-iran/

Has Iran really expelled nearly all of them?