Agua Fria High School
... that a mercury spill occurred at Agua Fria High School when students discovered and started playing with an unsecured supply of the element?
... that a <a href="./Mercury_(element)" id="mwUg" rel="mw:WikiLink" title="Mercury (element)">mercury</a> spill occurred at <b id="mwUw"><a href="./Agua_Fria_High_School" id="mwVA" rel="mw:WikiLink" title="Agua Fria High School">Agua Fria High School</a></b> when students discovered and started playing with an unsecured supply of the element?