Guidelines for classified information shows Signal chat should have been secret: expert

NEW LONDON, Conn. -- Coast Guard Museum curator Jennifer Gaudio, Lt. Michael Bell, Lt. Shawn Simeral, and Chief Petty Officer Terry Harmon look over nautical charts Feb. 24, 2014, which were used onboard a landing craft infantry (LCI) during D-Day. The charts were preserved by Coast Guard coxswain Al Green, who piloted a LCI during the D-Day invasion and took possession of the charts as he was egressing his damaged LCI. U.S. Coast Guard photo by Petty Officer 3rd Class Cory J. Mendenhall. (Photo: public domain image via Flickr)

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