Israel has two nuclear facilities, a nuclear reactor at Dimona in the Negev desert, and a smaller nuclear research facility at Nahal Sorek south of Tel Aviv. The fields of Nahal Sorek is the area where Samson met Delilah (Judges 16). Bet Shemesh controlled access to the mountains of Judah through the Sorek Valley. The Philistines sent the Israelite Arch of the Covenant back to Israel through the Sorek Valley and by Tel Bet Shemesh (1 Samuel 5).