SubWay

No, not the kind you think. Not the London's Tube or Paris' Metro or other cities' subway mass transport systems. This is the SubWay, like in Submarine sandwich way. These sandwiches that can be mistaken for US nuclear submarines come in 6 inch or a foot long. For your metric type people, a foot is 12 inches, which is 30,48 centimeters. Now, that's a big sandwich! That's why these US postmen are happy because they are enjoying an American fast food tradition break from work.