Who is Hassan Nasrallah, the Hezbollah leader Israel claims to have killed?

Israel claims to have killed Hassan Nasrallah, who took over leadership of Hezbollah in 1992, in an airstrike on Lebanon's capital.

Who is Hassan Nasrallah, the Hezbollah leader Israel claims to have killed?
Israel claims to have killed Hassan Nasrallah, who took over leadership of Hezbollah in 1992, in an airstrike on Lebanon's capital.