The United States gathered at memorials to mark a quarter-century since the September 11 attacks, as the anniversary revived debates over the day's legacy, security practices, and the health effects of the toxic dust.

Republicans opened a midterm convention in Dallas this week to rally voters, as Democrats organized a counter-response and questions swirled around President Trump's role.

Brent crude climbed above $100 a barrel for the first time since July as a widening exchange of attacks between the United States and Iran raised concerns about the security of energy supplies moving through the Persian Gulf.

A researcher at the AI company Anthropic has resigned, warning that the industry's rapid push toward ever more powerful systems poses a danger to humanity.

The U.S. Treasury will buy back up to $6 billion in longer-term debt on Sept. 10, tripling its usual buyback level as bond yields rose.