We had a great chance in the mid-2000s to reach an accord with the Chinese on both energy and environmental issues. That deal would have essentially been that the U.S. could provide the equipment and expertise, and the Chinese would help close the trade gap. It was a huge opportunity that we failed to exploit.

When confronted with a direct threat to American security, Obama has shown he is willing to act unilaterally - in a targeted, get-in-and-get-out fashion, that avoids, at all costs, the kind of messy ground wars and lengthy occupations that have drained America's treasury and spirit for the past decades.

The United States lost a bit of the moral high ground when it comes to warning the world of the danger of cyberattacks.

David E. Sanger Quotes