This New York Times piece is suggesting the answer may very well be yes:
Two defectors from Iran’s intelligence service have testified that Iranian officials had “foreknowledge of the 9/11 attacks,” according to a court filing Thursday in a federal lawsuit in Manhattan that seeks damages for Iran’s “direct support for, and sponsorship of, the most deadly act of terrorism in American history.”
One of the defectors also claimed that Iran was involved in planning the attacks, the filing said. The defectors’ identities and testimony were not revealed in the filing but were being submitted to a judge under seal, said lawyers who brought the original suit against Iran on behalf of families of dozens of 9/11 victims.
The suit’s allegation that Iran had foreknowledge of the attacks is hard to assess fully, given that the defectors’ testimony is being filed under seal.
The suit contends that Iran and Hezbollah, the Lebanese militant organization with close ties to Tehran, helped Al Qaeda in planning the attacks on Sept. 11, 2001, and in facilitating the hijackers’ training and travel. After the attacks, the suit contends, Iran and Hezbollah helped Qaeda operatives escape, providing some with a safe haven in Iran.
Americans should not expect one battle, but a lengthy campaign, unlike any other we have ever seen. It may include dramatic strikes, visible on TV, and covert operations, secret even in success. We will starve terrorists of funding, turn them one against another, drive them from place to place, until there is no refuge or no rest. And we will pursue nations that provide aid or safe haven to terrorism. Every nation, in every region, now has a decision to make. Either you are with us, or you are with the terrorists. From this day forward, any nation that continues to harbor or support terrorism will be regarded by the United States as a hostile regime.
And yet today, we have a President who regards America’s allies as hostile regimes and her enemies as nations to which we should bow.
What a difference a decade makes.