Are you sure?

来源: 于 2005-11-30 12:50:13 [旧帖] [给我悄悄话] 本文已被阅读：次

Are you sure about this? "Both sides of US and Canada share information each other when you cross the border."

Could you elaberate a bit? Do you have some first hand experience or any website/document to back such claim?