The latest gun-related massacre in the United States has happened in Dayton, Ohio.
It involved a gunman opening fire outside a bar. It's the 250th mass shooting for the year, in a day when 30 people died.
The first shooting was in El Paso. The gunman, Patrick Crucius made reference to the manifesto of the man accused of the Christchurch mosque shooting in his own document explaining why he carried out the attack.
Ben Decker is chief executive of digital investigations consultancy Memetica and has been following the spread of the accused Christchurch shooter's manifesto and its influence on other white supremacists.
