You think so? They have no problem killing 1,000,000+ people in Iraq. You think they value people in there own country that much more than in other countries?
It doesn't matter if they get found out because they can just make programs like the BBC one on sunday to paint themselves as being innocent and the masses will genuinely accept it as the gospel truth because it's coming from a state funded corporate media channel.
I watched the program on BBC and thought it was a blatent psy-op and damage limitation exercise. However, the statistics speak for themselves 50% of americans don't believe the official version of 9/11 and, rightly, think they're being lied to. And a smaller but growing amount of that 50% believe 9/11 was a total inside job. With those sort of statistics the establishment will find it difficult to sustain there lies for much longer and now they're just trying to stall the inevitable day when the masses wake up by feeding them heavily biased investigations that favour the official version of events like the rubbish on the BBC the other night.