If you are still in feelings that World is in peace and nothing could happen like WW II then you have to rethink again ... as my last post pointed out an article indicating WW III but still some one can ask why US need to so these all?
Well, at one side US needs possession on Oil reservoir to support economy and the other side US needs Oil for its own usage ...I believe following images tell 1000 words :)
The above picture clearly shows that consumption of Oil by US is much much higher than other countries ... surprisingly more than China and India too.
This picture shows that status of NON-ARAB oil reservoirs. You can see that till 2005 all NON-ARAB reservoirs have been crossed their peek time. So, now only ARAB reservoirs are hope for US :)
So be ready, test yourself without Electricity (no TV, no computer, no Internet), without petrol, with cracking sound of blast ... as we are the front-part of THIS 'war-against-terrorism'