Not sure what to make of this:

The United States mulled the unprecedented step of refusing Iranian President Mahmood Ahmadinejad a visa to attend next month’s UN General Assembly, the State Department said.

Deputy spokesman Adam Ereli said the U.S. was looking at the visa request by Ahmadinejad in light of allegations he might have been involved in the 1979 seizure of U.S. diplomats in Teheran.

The U.S. is obliged to permit world leaders to attend UN meetings at the organization’s headquarters in New York. UN officials confirmed no visa had ever been refused for a head of state.

The Daily Star: U.S. mulls visa ban for Iranian president