Hassan Diab holds a press conference at Amnesty International Canada in Ottawa, Ontario, on January 17, 2018 following his return to Canada. - Diab was released from a French prison after authorities in France dropped terrorism charges against him due to lack of evidence. Diab, a Canadian of Lebanese descent, was the chief suspect in a deadly 1980 attack on a Paris synagogue and was accused of being a member of the Special Operations branch of the Popular Front for the Liberation of Palestine (PFLP), which was blamed for the attack. The 1980 bombing, which left four dead and around 40 wounded, was the first fatal attack against the French Jewish community since the Nazi occupation in World War II. (Photo by Lars Hagberg / AFP) (Photo by LARS HAGBERG/AFP via Getty Images)