Yes, much of the world supports them now - specifically in North America; Amber alerts originating in any of the 3 countries with flight-risk can change CA-US,

Yes, much of the world supports them now - specifically in North America; Amber alerts originating in any of the 3 countries with flight-risk can change CA-US, US-MX border protocols https://en.wikipedia.org/wiki/Amber_alert https://en.wikipedia.org/wiki/Amber_alert