![Scott Porter, with his many guns at home in Louisiana.](https://imagenes.elpais.com/resizer/v2/W4NDWJ53TIPPKVZS5FA3VBLL2I.jpg?auth=26a786d396af1638c202295ca95be493822bd7fba0e9a7f28c62d36fd4445df5&width=414&height=233&smart=true)
America’s gun arsenal
When a 19-year-old with mental health issues went by his old school and massacred 17 people, the debate on gun control flared once more in a country with almost half the civilian firearms in the world. Despite the evidence, here’s why some gun owners won’t budge