work_against_tide_page_137

work | against tide page 137 | https://thedailydialectics.com/pdfs/work_against_tide/work_against_tide.pdf

FOP-SECREF-EMBRA—NOFORR- COMSEC SURVEILLANCE 125 During the 30-day survey, SCA monitoring units covered a majority of those circuits known to carry ARC LIGHT information. The 509th ASA Group in Vietnam blanketed common-user lines of the major trunks, Field Force and subordinate unit switchboards,…