Through the brooding noonday fog, a navy plane swooped down toward Buenos Aires' spreading Plaza de Mayo. Watchers in the busy plaza felt no alarm; air force planes were scheduled to drop flowers at midday on the plaza's Roman Catholic cathedral in honor of Argentine Liberator José de San Martin, whose tomb is in the church. But instead of dropping flowers, the plane loosed two dark objects that hurtled downward toward President Juan Perón's headquarters, the block-long Casa Rosada (Pink House) standing at the other end of the plaza.
An eardrum-rupturing explosion, then another, sent blinding clouds of smoke and dust...