Even the children who have never had a shooting at their own school are not free from the damage.
Bundled against the cold but fired up with passion after a Florida high school massacre, crowds gather in Washington for what is expected to be the biggest US gun control protest in a generation, with hundreds of thousands attending.
Republican Donald Trump says he will like people on terror watch lists to be prevented from buying guns, in the wake of the Orlando shootings.
The man accused of killing nine people at a community college in Oregon left behind a manifesto detailing his grievances, US media report.
