Attempted assassination of Konrad Adenauer
An assassination attempt using a letter bomb was made in 1952 on West German chancellor Konrad Adenauer by former members of the Irgun, an Israeli Zionist militia, over the controversial Holocaust reparations Germany agreed to pay Israel. The attempt was unsuccessful, as Adenauer was not hurt.
Source: Wikipedia — Attempted assassination of Konrad Adenauer (CC BY-SA 4.0)