The purchased of the volcano by the federal government saw it become a military base for WW2. After the attack on Pearl Harbor in 1941, further gun emplacements, pillboxes and foxholes were built to be able to better defend Oahu in the future. Many of them still remain on the crater rim and one underground facility, the Birkheimer Tunnel, houses the headquarters for the State Civil Defense Agency. On top of a pill box looking out over Honolulu, the performer chose to hold simply a letter O because he said it represented the shape of the volcano from his location.
Location: Diamond Head
United StatesPerformed in: 2015