So for my friends who think that perjury, lying and deceit are in some circumstances acceptable and undeserving of punishment I respectfully disagree.

CNN: Transcript: House Judiciary Committee

As he demonstrates, it is not necessary to be a dove or an anti-militarist to believe that, in some circumstances, it is appropriate and vital for politicians to immerse themselves in the details of military affairs.

ECONOMIST: Civilian leadership in war

Steven Lindsay, a licensed insurance agent and a lobbyist for the California Association of Health Underwriters, says that in some circumstances, insurers will give steep discounts to preferred customers.

NPR: Age, Gender Skew Group Health Care Rates

The Sommerfeld effect, a quantum-mechanical process that makes particles more likely to interact with one another in some circumstances and less likely in others, is mostly ignored in particle physics because it applies only in a limited range of conditions.

ECONOMIST: Two new ways to detect the elusive stuff of the universe

And while this principle is absolutely necessary in some circumstances to protect national security, I am concerned that it has been over-used.

WHITEHOUSE: President Obama: Our Security, Our Values

And we have also had fortunate circumstances of actually learning from history from some communities around the country that have been in a situation similar to us, not exactly the same, but similar.

CNN: Transcript of June 'CNN Money Summit: Money & Main St.'