What happened?

What I think that happened in September 11-2001 was that terrorist have the bad mind to blow up two of the most important towers in the world.Why would they do this knowing they were going to die.I want to know how they plain this over the years and how they go into the country with fake passports.Why didn't the the passengers in the plain figure out what was happening and could save the worldtratecanter.Why did the president went to war with Iraq and not from were the terrorist were from.I think that Obama did a good job taking out the most wanted terrorist Osama bin Laden.Also how Osama bin Laden was hiding for ten years and we could not find were he was.September 11,2001 change our life's,but many brave fireman,police,and paramedics save many peoples life's.