A great idea from Ricedream McGee:
“What Bloomberg should do is go on TV and say, ‘Look, if you enter this city on any day, you’re taking your life in your fucking hands. Pretty much from the time you wake up to the time you go to sleep. We’re done with the warnings. Take it easy.'”
Jennie Smash 
And visiting New York, terrorists should be the least of your worries.