LX Subway #2

Street Photography in Lisbon Subway, I need to photograph just for me, I love street photography so these days of vacation and as always with my camera I did some photos in the subway, random ones and I had to sneak. I really don't understand why we can not photograph in the subway in Portugal, I have thousands of photographs of the New York Subway, and Copenhagen Subway, and always showing my camera and even ask to the local authorities if there was any problem with taking photographs and no problem at all.
But yep whatever....I take anyway, I'm sure if there is any terrorist attack the first thing that authorities will ask is if anyone was taking photos to try to identify the authors.