 Complete the following phrase:  During the decade, with the beginning of the so-called, strategy of tension, the CGIL was the target of terrorist attack, perpetrated by neo-fascist groups. On 28 May 1978, a bomb exploded during a trade union rally in Piazza della Loggia, Brescia, killing eight people and wounding more than one hundred. The bomb was placed inside a rubbish bin at the east end of the square. It was the beginning of the Years of Lead, a period of social and political turmoil that lasted from the late 1960s until the early 1980s, marked by a wave of both left-wing and right-wing political terrorism, which culminated with the kidnapping and murder of Christian democratic leader, Aldo Moro, in 1978 and 