It is only a matter of time before suicide bombers happen here in the states. Every single one of us needs to prepare for it because it will happen. Perhaps what has happened in London is already doing that. Prayers for our English friends.
And they will hit a target of high political/cultural value here in the USA. If I were a casino owner in Las Vegas, NV I would step up security substantially before a terrorist drives a passenger minivan loaded with explosives in front of a casino entrance and detonates the bomb, which could kill hundreds of people.