Thank you for the opportunity to help you with your question!
Yes, I believe that the establishment of terrorism as a crime that can be committed domestically has changed policing. The reason is that local law enforcement personnel are now required to work directly with federal task forces and to share information that was previously kept locally. New joint operations have sprung up in nearly every large city where numerous agencies share information and work together to thwart domestic and international terrorism. Examples of this can be observed by looking at the new 911 centers, new computer programs (such as the enhanced NIBRS) and the Puget Sound Joint Terrorism Task Force which was formed in 2000.
Please let me know if you need any clarification. I'm always happy to answer your questions.