Northbound today at 5:10 PM I was on the Marta train. When it stopped at Lindberg the train operator announced we would be a while due to a security sweep. Two cops (solders ?) in desert camo hit every car. They had their hands on their thigh holstered pistols (to prevent snatch?) while they walked the car one behind the other. Looking only at the floor not the folks on the train. Two, in some cases three, more on each side of the each train car on the platform, one (per train car) with a 30 cal carbine with a long straight magazine, fully loaded, I could see the stack of brass in the mag. The carbines also had some kind of supressor (flash, other ?). I clearly do not know my AR15's or their full auto version. Some of the cops were Marta others were DHS Police. The camo guys could have been anything, I could not tell. The ones on the train and some over on the platform had video cameras on their helmets. Probably three dozen cops (or?) all total for the train. Don't know what to think about this. However, every time I deal with the TSA at the airport I cheer the latest Afgan body count.