The reluctance to share information is also a historical issue. That's another battle, to encourage people to share information when they should and to do so in a timely manner.
I think what you're talking about is a culture that we have to change in order to fight terrorism. We are finding that small pieces of information are so relevant, yet we don't share them at the time. It is important to develop a strategy that trains not individuals but agencies, and which has some oversight so there is accountability with the different agencies so that they share information when they should and not share it when they shouldn't.