As I said elsewhere, when some are willing to play with dear life, then it's impossible to stop the likes of 9/11 and other similar incidents, more recently again demonstrated by rag tag Talibans by breaching several high security zones in Afghanistan, more over the likes of Tamil Tigers have proven that once you breach a big complex facility like an airbase, damage becomes almost inevitable. While all the trouble is brewing in North, the PN did let it's guard down in South, however, now it's established that without inside help, such an operation was almost impossible.
