Keywords: SSN-721 Crest.jpg USS Chicago SSN-721 Crest PD-USGov original upload log page en wikipedia SSN-721_Crest jpg 2008-07-29 16 16 Subman758 155×157× 23005 bytes <nowiki>USS Chicago SSN-721 Crest</nowiki> USS Chicago SSN-721 United States Navy submarine emblems 721 |