ARTICLE: Why Obama Should Learn to Love the Bomb, By Jonathan Tepperman, Newsweek, Aug 29, 2009

Nice piece, with the added benefit of words from Ken Waltz:

The risk of an arms race--with, say, other Persian Gulf states rushing to build a bomb after Iran got one--is a bit harder to dispel. Once again, however, history is instructive. "In 64 years, the most nuclear-weapons states we've ever had is 12," says Waltz. "Now with North Korea we're at nine. That's not proliferation; that's spread at glacial pace."

(Thanks: Jim Jeansonne)