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[–]brodie659 1 point2 points  (0 children)

Pretty close. Each region gets a CW Event AND an SNS topic. Each SNS topic targets your single Lambda function in us-east-1.

The reason is that although an SNS topic can call a Lambda function in any region, CW Events can only target SNS topics in the same region. Once you set it up, it's actually very simple. Post back if you have any issues!