people sniffers
... that during the Vietnam War, the North Vietnamese Army and Viet Cong hung buckets of mud with urine in trees to thwart American people sniffers?
... that during the <a href="./Vietnam_War" id="mwAQ4" rel="mw:WikiLink" title="Vietnam War">Vietnam War</a>, the <a class="mw-redirect" href="./North_Vietnamese_Army" id="mwAQ8" rel="mw:WikiLink" title="North Vietnamese Army">North Vietnamese Army</a> and <a href="./Viet_Cong" id="mwARA" rel="mw:WikiLink" title="Viet Cong">Viet Cong</a> hung buckets of mud with urine in trees to thwart American <b id="mwARE"><a href="./People_sniffer" id="mwARI" rel="mw:WikiLink" title="People sniffer">people sniffers</a></b>?