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https://www.uscis.gov/green-card/after-we-grant-your-green-card/international-travel-a-permanent-resident#:~:text=Permanent%20residents%20are%20free%20to,affect%20your%20permanent%20resident%20status.&text=A%20general%20guide%20used%20is,for%20more%20than%20a%20year