NEW YORK - Columbia University's heads are resisting pressure to cancel a scheduled appearance by Iranian President Mahmoud Ahmadinejad at the school tomorrow. However, the real headache for the New York City police is likely to be the Iranian leader's attempt to visit Ground Zero.

Police Commissioner Raymond Kelly had prohibited Ahmadinejad's visit to the scene of the September 11, 2001 terror attacks on the Twin Towers, but according to an interview he gave to "60 minutes," to be broadcast tonight, the Iranian president has not abandoned his plan to visit the site. However, when asked his opinion as to Kelly's refusal to allow the visit, Ahmadinejad said it would have to be coordinated with the local authorities, and if they did not agree, he would not insist.