sentences:  The secret was badly guarded, since as early as summer rumors of a coup were circulating during the difficult negotiations that led to the formation of Aldo Moro's government (June 26–July 17).The coup plans were investigated in 1967, when the journalist Eugenio Scalfari and Lino Jannuzzi uncovered the attempt in the Italian news magazine "L'espresso" in May 1967.However, the results of the official investigation remained classified until the early 1990s.