If there is one thing that is abundantly available in New York it is cops. On every corner of every street you can find a cop. Before every big or important building there is some person in a security outfit. If you want to park your car they will search your trunk and in some cases they check the bottom of your car with mirrors. In the metro it is swarming with cops and metro employees. When you enter a museum they check your bags and in every room you can expect to find security.
A safe situation, but it gave me a very strange feeling. Yesterday when I was heading to my car I was walking though a street where there was even a little sign, indicating that there was an atomic bomb shelter… This really gives you some food for though.