Israeli Caterpillar D9 armored bulldozers were routinely employed to detonate booby traps and IEDs, to demolish houses along the border with Egypt that were used for shooting at Israeli troops, to create "buffer zones", and to support military operations in the West Bank. Until February 2005, Israel had in place a policy to demolish the family homes of suicide bombers after giving them a notice to evacuate. Due to the considerable number of Palestinians living in single homes, the large quantity of homes destroyed, and collateral damage from home demolitions, it became an increasingly controversial tactic. Families began providing timely information to Israeli forces regarding suicide bombing activities in order to prevent the demolition of their homes, although families doing so risked being executed or otherwise punished for collaboration, either by the Palestinian Authority or extrajudicially by Palestinian militants. The IDF committee studying the issue recommended ending the practice because the policy was not effective enough to justify its costs to Israel's image internationally and the backlash it created among Palestinians.