In my early 20s, when I did a lot of scuba diving, I dove the great white wall in Fiji. Problem was when I arrived at Nadi Airport they had just had a coup. Had my fair share of machine guns pointed at me through various check points. Couple times I wasn't sure if I was going to make it back.
Once I got to Taveuni Island all was chill. Way back wasn't too bad as coup was more complete.
I'm good diving in Hawaii from now on.