[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/02/16/ahmadinejad.gi.art.jpg caption="Iranian President Mahmoud Ahmadinejad made his comments in a televised news conference Tuesday."] Tehran, Iran (CNN) – Iranian President Mahmoud Ahmadinejad warned the United States and other nations Tuesday not to impose tougher sanctions in reaction to the Islamic country's nuclear ambitions. Iran already faces U.N. sanctions and the five permanent Security … Continue reading Ahmadinejad has warning for U.S.