I reread my notes regarding the travel overseas and left out "Security". In a lot of cases traverlers are overly concerned about security. Almost all cities are the same. I worked for many years in NY City and for a while before it was really safe. We always told new visitors to follow 3 rules which were (1) If you see something going down ignore it, (2) If a street does not look safe it probably isn't so don't go down it, (3) avoid a lot of eye to eye contract as in some cases the person sees that as threatening. These are good rules regardless of the city. In Europe you have mostly non violent crimes, like pickpockets, simple roberies, etc. While in the US you get more violent crimes. Make sure you have money belts, etc to protect you passport and currency. When you get off the ship only take enough currency for that shore visit. Make a copy of your passport and leave it at home so if yours gets lost or stolen you can have a copy sent overnight. There are a number of other things to consider but I thought these are some of the critical ones.