We must remember that the same thing that defined our strength on that day should define our strength in response -- a nation that unites people from every faith, culture and background in a common purpose.

CNN: Don't scapegoat a faith for bombings

As a matter of common sense, the IGC proposed a neutral, independent background review process for new candidates for senior office to reduce the chance that the organization would be embarrassed by inadvertent association with felons and miscreants and to explore possible conflicts of interest.

FORBES: FIFA's Rotten Reform Record

For this reason, it was necessary to find a common ground to group the professions, such as the academic background that allows a person to become an auditor (a degree, master's degree or doctorate in accountancy, for example).

BBC: How it's worked out

All three outcomes were more common in women and those from a working-class background.

BBC: Child headaches 'a long-term pain'

Requiring a simple background check every time a gun is sold is common sense.

CNN: Reid to force a vote Thursday on debating gun proposals

"I think the common ground clearly exists from a policy standpoint when talking about background checks, " said Dan Gross, president of the Brady Campaign to End Gun Violence.

CNN: Gun debate: Where is the middle ground?

The fact that we would be voting on -- that the Senate would be voting on a bipartisan, common-sense compromise amendment that would establish an expanded background check system has been known for some time.

WHITEHOUSE: Press Briefing

The most common warning signs, according to the guide, include uncontrolled anger, a background of drug and alcohol abuse and a preoccupation with weapons and explosives.

CNN: Clinton unveils national guide on school violence