The attack intensified national debates over preparedness and civil liberties, provoked controversial prosecutions (notably of Tom Mooney and Warren Billings), and exposed domestic tensions during the run-up to U.S. involvement in World War I.
A bomb exploded during a Preparedness Day parade in San Francisco on July 22, 1916, killing at least 10 people and injuring dozens amid a pro-military preparedness rally.
The attack intensified national debates over preparedness and civil liberties, provoked controversial prosecutions (notably of Tom Mooney and Warren Billings), and exposed domestic tensions during the run-up to U.S. involvement in World War I.
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On June 16, 2026, the FBI announced it had successfully disrupted an alleged plot involving explosive-laden drones targeting a high-profile Ultimate Fighting Championship (UFC) event at the White House, an event notably associated with Donald Trump.
The FBI thwarted a planned attack on a UFC event hosted by Trump at the White House.
A gunman was killed after opening fire near the White House, prompting a security response.
A gunman was shot and killed by Secret Service agents after opening fire near the White House.