Jacksonville, Florida where David Katz  was playing in a videogame tournament, before murdering  Eli Clayton and Taylor Robertson. Photograph: Gianrigo Marletta / AFP

It’s a long-standing argument: do violent videogames – or films or TV – increase violent or aggressive behaviour in real life? Particularly after mass(...)

The GLHF Game Bar, Florida, where David Katz killed three people including himself. Photograph:  Joe Raedle/Getty Images

It’s a long-standing argument: do violent videogames increase violent or aggressive behaviour in real life? After mass shootings, the shooter’s video (...)

Geobanni Ramirez says he is dealing with problems he wasn’t warned about after having Lasik surgery, in Austin, Texas. Photograph: Tamir Kalifa/The New York Times

Ever since he had Lasik surgery two years ago, Geobanni Ramirez sees everything in triplicate. The surgery he hoped would improve his vision left the (...)