Considering how close the police forces of Australia and Indonesia are, I seriously doubt the US will be necessary in this particular situation. Mick Keelty has done a great job enhancing friendships with the Indonesian police force, and we can pretty much count on them investigating this fully and finding the perpetrators. The Bali Bombings were a watershed in cooperation, and there's no way that those responsible with this bomb will be able to get away with it this time. The laws apply this time and I doubt it will be long before the organisers are trapped and dealt with.
