Sentence:  But so, it seems, is the problem. The furor instigated by the war in Vietnam was projected into fraternity bull sessions and Ballantine coffee breaks. The trouble was that nobody, not even Rusk or Zinn, had a <WSD>deathlock</WSD> on accurate information. 
Meaning of the word marked with <WSD> tags:  A similarly tight hold on something nonphysical.