Novaya Zemlya
Novaya Zemlya was the site of one of the two major nuclear test sites managed by the USSR , used for air drops and underground testing of the largest of Soviet nuclear bombs , in particular the October 30 , 1961 , air burst explosion of Tsar Bomba , the largest , most powerful nuclear weapon ever detonated . 
<triplet> Tsar Bomba <subj> October 30, 1961 <obj> point in time