Simply put, their actions have caused an increase in the amount of security in our country. The technology for public safety also has been greatly developed in the post cold war era. In terms of policies I would say there are more limitations/restrictions to things you can bring on a plane and things like that. Hope this helps...
Answer:
kinda vauge
Explanation:
but I think it would be the voting rights act of 1965
Answer: but & thus
Explanation: thus: as a result or consequence of this; therefore
but: used to introduce a phrase or clause contrasting with what has already been mentioned