A 15-year-old trapper boy sits at a door to the entrance of a West Virginia coal mine in 1908. Trapper boys were paid a pittance to sit in the same spot for 10 hours at a time to open and close the doors when coal cars came past
A British R33-class airship, which measured almost 650 feet long, pokes its nose out of a gigantic hangar in Barlow, Yorkshire prior to its launch in 1919