Defense Minister Moshe Ya'alon said Sunday that while Israel's leaders are obligated to always seek peace with the Jewish state's neighbors, they must not delude themselves as to the intentions of the country's enemies.Speaking at memorial ceremony for the fallen of the Yom Kippur War at the Mount Herzl military cemetery in Jerusalem, Ya'alon warned that "from far and near their are attempts by organizations, states and entities to harm us in various ways."The defense minister said that the threats come in the form of rockets and missiles, terror, delegitimization and ambitions to develop nuclear weapons. "We must know how to battle back at any place and in any arena, whether militarily or diplomatically, if, heaven forbid, we are forced to do so," he said."This is our obligation to our sons and daughters who have fallen, and our obligation to you, dear families," Ya'alon said to the bereaved relatives attending the ceremony. "You serve as an example to all of us, with your ability to return to a life of doing and creating. If this is not human heroism, I don't know what human heroism is," he concluded.