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"USSRONALDREAGANgoodshot" by Photographer's Mate 3rd Class Elizabeth Thompson - Main article, with link to image.. Licensed under Public Domain via Wikimedia Commons.
"Breakup of Yugoslavia-TRY2" by Original by Hoshie; derivative by DIREKTOR - Made by DIREKTOR, see above for more details on sources. Licensed under CC BY-SA 3.0 via Wikimedia Commons.
"North face south tower after plane strike 9-11" by Robert on Flickr - → This file has been extracted from another image: UA Flight 175 hits WTC south tower 9-11 edit.jpeg. . Licensed under CC BY-SA 2.0 via Wikimedia Commons.
"Powell-anthrax-vial" by United States Government - Made from video from this link: https://web.archive.org/web/20030411134510/http://www.whitehouse.gov/news/releases/2003/02/20030205-1.html. Transferred from en.wikipedia. Licensed under Public Domain via Wikimedia Commons.
"Police line near Krudttønden, Copenhagen, Denmark" by Kim Bach - Own work. Licensed under CC BY-SA 4.0 via Wikimedia Commons.