Iranian President Mahmoud Ahmadinejad has denied Tehran’s involvement in a plot to assassinate the Saudi ambassador to the U.S., saying everyone “laughs” at the accusation. “The U.S. administration is sorely mistaken,” Ahmadinejad told Al Jazeera. “The economic problems of the U.S. are very serious, and by accusing Iran it's not going to solve any problem." He added, “Terror is for people ... who don't have any logic. The people of Iran are pro-logic.” Ahmadinejad may have bigger things to worry about: The Washington Post reports that Iran’s nuclear program is beset by problems, including malfunctioning equipment and parts shortages.