Rabbi Yitzchak Dadon, the author and Torah scholar who killed the terrorist in Merkaz HaRav, entered his son Elkannah into the Abrahamic covenant today. The brit took place in the Merkaz HaRav library where the Arab terrorist murdered eight young Torah scholars in cold blood. The mohel was non other than Tzemach Hirshfeld, the father of Yonadav Haim Hirschfeld z"l, one of the students that was murdered.
Arutz 7 has the video. It's in Hebrew and it is a must see!
Update: Now in English.