Politics: Pakistani nuclear technology greatest terror threat?

This Nicholas Kristoff NTY Op-Ed piece suggests that U.S. leniency towards Pakistan in exchange for an ally and possibly Bin Laden's ass has probably made the world a more dangerous place:

I'm talking about the arrangement under which the U.S. cuts Pakistan some slack on nuclear proliferation, in exchange for President Pervez Musharraf's joining aggressively in the hunt for Osama - in the hope of catching him by Nov. 2.

If a nuclear weapon destroys the U.S. Capitol in coming years, it will probably be based in part on Pakistani technology. The biggest challenge to civilization in recent years came not from Osama or Saddam Hussein but from Abdul Qadeer Khan, the father of Pakistan's atomic bomb. Dr. Khan definitely sold nuclear technology to Iran, North Korea and Libya, and, officials believe, to several more nations as well.