User talk:2A01:4C8:42D:D301:1:2:677C:B6BE

Recent edit to Mexico–United States barrier
Hello, and welcome to Wikipedia. I noticed that you made a change to an article, Mexico–United States barrier, but you didn't provide a reliable source. It's been removed for now, but if you'd like to include a citation and re-add it, please do so! If you need guidance on referencing, please see the referencing for beginners tutorial, or if you think I made a mistake, you can leave me a message on my talk page. Thank you! Materialscientist (talk) 12:30, 17 January 2019 (UTC)