The Eiffel Tower in Paris is closed

Because of recent security measures and threats the entire tower has been closed to visiting tourists. When I was on the Second Deck it occured to me that most of Paris  is in a similar situation, that of being located on narrow streets with a majority of the population vulnerable on grade  and in the subway. The need for security is now at an all time high. In our world where wars are fought as guerilla actions we are no long as s  safe as we where the world was smaller. And the old secuity measures are now in a paradim shift.