There have been numerous atrocities - including a single shell fired at Sarajevo's Markale market on 5 February 1994 which killed 68 people and wounded more than 100.

BBC: 1996: Siege of Sarajevo is lifted

It sustained only a single shell hit.

ECONOMIST: Congo-Brazzaville

If one of these spent shells is in the chamber, racking the slide will, in a single fluid motion, eject the old shell out the side of the gun and push a fresh round into the chamber.

NEWYORKER: A Loaded Gun

Hovering close to the ground, each of these thin-shell dwellings is made entirely out of a single concrete slab stretched out to create an energy efficient structure that is environmentally greener than traditional construction methods and cheaper and faster to produce.

FORBES: Binishells: Home Of The Future

Upon cracking open the shell, which was apparently impossible to do without shattering the screen, iFixit found a single assembly that housed all the components.

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