A VERY tall man dressed in a black suit with a conductors cap..............looking AT me. As he got closer I noticed the buldge under his arm as well as no name plate on the conductors cap. As he got to our group of nicotine mainliners, he started idle conversation but kept looking at me. I asked him point blank.........."so, are you Homeland Security or Amtrak or what?" ( by this time he realized as fat as I am and light complected I was not likely to be a terriost) He said " well, you've made a few people nerivous Mr. P####, how do you know so much about trains ?"