Israel is at war on two fronts: Israel suddenly finds itself at war on two fronts, but the scenario has been building for years - especially since Iraq rained Scud missiles on Israeli cities in the 1991 Gulf War and the international community demanded Israeli restraint. Missiles and rockets have become the weapon of choice of Israel's worst enemies. They are much cheaper and easier to use than multi-million dollar jet fighters; they are "threat enhancers," meaning they sow a lot of panic; and they can be concealed in and fired from civilian areas, making them harder to counteract. The descent to war began with a cross-border attack on the Kerem Shalom army base on June 25 by Palestinian terrorists who tunneled from southern Gaza, killed two IDF soldiers and abducted a third, Cpl. Gilad Shalit. In response to the Hamas-led attack and on-going Kassam rocket fire into Israeli cities, the IDF launched a sustained military campaign called "Operation Summer Rains" meant to weaken the radical Islamic militia. As hostilities escalated, IDF ground forces re-entered the Strip for the first time since disengagement, while Hamas crossed a "red line" by firing Kassams into the city of Ashkelon.