Sinai was and still is a hotbed for Global Jihad. Weapons are being smuggled from Sinai into Gaza, including Grad missiles. Some of these missiles presumably remain in Sinai, waiting to be launched... Global Jihad activists have come to the Gaza Strip, trained there, armed themselves and returned to Sinai to commit acts of terror against tourist targets in Sinai and elsewhere in Egypt. That may be the case this time as well.Oh, well. I'm sure the next "land for peace" deal will work out much better.