In modern America, it seems violence of this kind has become an ever-present storm that can strike anywhere and at any moment.
Oz Pearlman - a self-described "mentalist" - was speaking to Trump, First Lady Melania Trump and press secretary Karoline Leavitt as the attack happened.
Blood filtering has performed well in early trials
Hardware-makers are failing to invest enough to keep up with demand
The fund - which Canadians can invest in directly - will help pay for major infrastructure projects in the country, the prime minister says.
Shashank Joshi, our defence editor, examines whether the country can achieve its goals—and what stands in its way
They bore the brunt of his trade war. Now the war in Iran is pushing some to the brink
We didn’t U-turn. The world changed, writes Indermit Gill, the bank’s chief economist
Yet they often face high barriers to employment and unpalatable options
A new campaign to put down phones and pick up classics
Why Texans throw a birthday party for Eeyore—and everyone else should, too
Richard Cockett, a senior editor, analyses what makes good generalship—and ranks his top three