As a mother of a son on a carrier in that part of the world, I find this very difficult to read.
Fear not. Your son is safer at sea, aboard a carrier, than on liberty call.
The best defense is a good offense. A carrier and it's battle group are designed to project force. They employ a multitude of air, surface, and subsurface assets to identify and attack potential threats before they become threats. They train to do this nearly 24/7 and they are very good at it.