After a recent radio spot, I received an email. The writer asked why I was so concerned about the prospect of Iranian nuclear weapons. After all, he asked, haven't such weapons been with us -- unused -- for decades? Here's my answer. Iran's leaders are driven by two goals. They seek power at all costs. Their ruthless suppression of their own people underscores the point. And they claim a direct, 1-800 line to God. That allows them religious justification for all they do. Nuclear weapons in such hands