Iran is not a threat to the U.S. or their neighbors.
Now Seymour Hersh has inside information to confirm this. Of course, Hersh provides consistent and usually accurate reporting on national security. His latest, Iran and the Bomb , is a good read, though with his characteristic unattributable sourcing. (You can also watch him on Democracy Now!) The important point to remember is that without Hersh's unnamed sources, the public record is rich in the fact that Iran is not building a nuclear weapons program.