McDonald's cannot flourish without McDonnell Douglas, the builder of the F-15.

That's right-the striking thing about greenhouse gases is the diversity of sources that emit them. A herd of cattle belching can be worse than highway full of hummers.

What we have in the Bush team is a faith-based administration. It launched a faith-based war in Iraq, on the basis of faith-based intelligence, with a faith-based plan for Iraqi reconstruction, supported by faith-based tax cuts to generate faith-based revenues.

It has always been my view that terrorism is not spawned by the poverty of money; it is spawned by the poverty of dignity. Humiliation is the most underestimated force in international relations and in human relations. It is when people or nations are humiliated that they really lash out and engage in extreme violence.

Once people get a taste for whatever you want to call it - economic independence, a better lifestyle, and a better life for their children - they grab on to that and don't want to give it up.

When widely followed public figures feel free to say anything, without any fact-checking, it becomes impossible for a democracy to think intelligently about big issues.

Until we fully understand what turned two brothers who allegedly perpetrated the Boston Marathon bombings into murderers, it is hard to make any policy recommendation other than this: We need to redouble our efforts to make America stronger and healthier so it remains a vibrant counterexample to whatever bigoted ideology may have gripped these young men....And the best place to start is with a carbon tax.