 Complete the following phrase:  The building was commissioned in 1950 by President Juan Perón for the Association of Unionized Latin American Workers ATLAS, S.A.; he ordered that plans include an underground bunker for use in case of war or a coup détat. Perón, however, did not seek refuge there during the June 16, 1955, bombing of Plaza de Mayo by the Argentine Navy in an attempted coup, nor was he able to do so during his eventual 