The artillery rounds were fired over Interstate 5 near Camp Pendleton in San Diego as part of a military demonstration for the Marine Corps' 250th anniversary.
Shrapnel from artillery rounds fired by the U.S. Marine Corps during a celebration in front of Vice President JD Vance and Secretary of War Pete Hegseth detonated prematurely and struck a patrol car, the California Highway Patrol said.
The artillery ... [3333 chars]