• http://www.search-engine-academy-washington-dc.com seodc

    That Security Directive (SD) is Sensitive Security Information (SSI). It’s not for the general public; it pertains to protecting transportation security information. Go read 49 CFR, Part 1520. It’ll tell you all about SSI. SD’s are never for the public; they are only for aviation/airline personnel who are involved in the industry itself or those who regulate transportation security.