User talk:2601:1C0:8701:1620:C5AE:DFB7:22A8:251A

October 2021
Please do not add or change content, as you did at Avangard (hypersonic glide vehicle), without citing a reliable source. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Thank you. M.Bitton (talk) 17:44, 29 October 2021 (UTC)