Operation Tracer
...that Operation Tracer was a top-secret WWII mission in which six men were to be buried alive inside the Rock of Gibraltar so that they could monitor enemy movements after the Rock's capture?
...that <b id="mwEBU"><a href="./Military_history_of_Gibraltar_during_World_War_II" id="mwEBY" rel="mw:WikiLink" title="Military history of Gibraltar during World War II">Operation Tracer</a></b> was a top-secret <a href="./World_War_II" id="mwEBc" rel="mw:WikiLink" title="World War II">WWII</a> mission in which six men were to be buried alive inside the <a href="./Rock_of_Gibraltar" id="mwEBg" rel="mw:WikiLink" title="Rock of Gibraltar">Rock of Gibraltar</a> so that they could monitor enemy movements after the Rock's capture?