"If the purpose is to increase security checkpoint flow, there are much more effective steps we can take together to streamline the security checkpoints with risk-based screening mechanisms, " he wrote in a letter to Pistole.

CNN: March 10, 2013 -- Updated 0334 GMT (1134 HKT)

There are three effective mobile security steps we can take right now.

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The company believes that through open dialogue, effective communication and mutual understanding, they can take the first steps to maintaining relationships in good faith as needed to create shared value.

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But rather the kind of fear that motivates you to take the steps to be aware, knowledgeable, capable, prepared, decisive and effective.

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He made clear we will take concrete steps toward a world without nuclear weapons, while retaining a safe, secure, and effective arsenal as long as we still need it.

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