Vortex I
...that Vortex I, which took place in Oregon in 1970, remains the only state-sponsored rock festival in United States history?
...that <b id="mwBeg"><a href="./Vortex_I" id="mwBek" rel="mw:WikiLink" title="Vortex I">Vortex I</a></b>, which took place in <a href="./Oregon" id="mwBeo" rel="mw:WikiLink" title="Oregon">Oregon</a> in 1970, remains the only state-sponsored <a href="./Rock_festival" id="mwBes" rel="mw:WikiLink" title="Rock festival">rock festival</a> in <a href="./United_States" id="mwBew" rel="mw:WikiLink" title="United States">United States</a> history?