"For the Palestinian terrorist organizations, rockets and mortars serve as an asymmetric response to Israel 's military superiority. They are simple, available and cheap."From a new study published today by Israel's Intelligence and Terrorism Information Center. The chart above, documenting Qassam attacks on the Israeli communities bordering the Gaza Strip, is from the study too. Click to read the whole depressing report. And note the impact on the rate of rocket firings of the abandonment of the Israeli communities inside the Gaza Strip in 2005.