Complete the following sentence: On 4 August 1974,
<unk> <unk> <unk> <unk> <unk> <unk> The train was travelling from Rome to Munich; having left Florence about 45 minutes earlier, it was approaching the end of the long San Benedetto Val di Sambro tunnel under the Apennines.<unk> The train was travelling from Rome to Munich; having left Florence about 45 minutes earlier, it was approaching the end of the long San Benedetto Val di Sambro tunnel under the Apennines. The bomb had been placed in the fifth passenger car of the train and exploded at 01:23, while the train was reaching the end of the tunnel. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️