'During World War II, silk was used to make the canopies of these; today they're usually made of nylon'
parachutes
SILK: During World War II, silk was used to make the canopies of these; today theyre usually made of nylon
During World War II, silk was used to make the canopies of these; today they're usually made of nylon
During World War II, silk was used to make the canopies of these; today they're usually made of nylon
SILK
parachutes
SILK