I live in Maryland, near PA and DE. Last week I saw four or five dark-haired men walking around the railroad tracks in my town. They were dressed rather heavily for the weather and did not appear to be working or walking to somewhere - like directly up the tracks. They were just looking around and they did not look like vagrants. It's fairly unusual since there was derailment there last year that lead to chemical leaks and everyone steers clear of that area. The tracks are part of the main line for Washington to NY commuters. At the time, I only made a mental note because I could not see them well and I was in my car going over a small bridge that goes over the tracks. It did appear suspicious, but it could have been anyone. With this new information out, I just cannot help but to wonder.
You need to stock up on disposable cameras...
ping to #112, now I can't help but wonder, either...