◾️When the military tried to give soldiers personal flying platforms(TASK&PURPOSE網站:https://taskandpurpose.com/history/army-navy-1950s-flying-platforms-jetpacks/): ⋯⋯ In the mid-1950s the Office of Naval Research, in a joint project with the Army, began to see if flying platforms would be both feasible and practical. And it turns out, the personal VTOL machines worked. Troops did fly on them. ⋯⋯