As a result of <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Nerve_gas" id="mwxQ" rel="mw:WikiLink" title="Nerve gas">nerve gas</a> testing by the <a href="https://en.wikipedia.org/wiki/United_States_Army" id="mwxg" rel="mw:WikiLink" title="United States Army">U.S. Army</a> <a href="https://en.wikipedia.org/wiki/Chemical_Corps" id="mwxw" rel="mw:WikiLink" title="Chemical Corps">Chemical Corps</a> in <a href="https://en.wikipedia.org/wiki/Skull_Valley_(Utah)" id="mwyA" rel="mw:WikiLink" title="Skull Valley (Utah)">Skull Valley, Utah</a>, over 6,000 sheep are <a href="https://en.wikipedia.org/wiki/Dugway_sheep_incident" id="mwyQ" rel="mw:WikiLink" title="Dugway sheep incident">found dead</a>.