Why are these Americans turning in (some of) their guns?
In the United States there are more guns than people. On a recent Saturday morning, hundreds queued up in Houston, Texas, to turn their guns over to police.
More than 800 guns were collected in this effort by local law enforcement to make the city safer - but many who gave up their firearms have many more at home.
Video by Angélica M Casas and Alexandra Ostasiewicz