"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)

"We commit to continue working together to stabilize financial markets and restore the flow of credit, to support economic growth, " G-7 finance ministers and central bankers said in a joint statement Friday evening.

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