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.

A California Highway Patrol cadet died Sunday in a collision on Interstate Highway 5 at West Benjamin Holt Drive in northwest Stockton.

I-5 closes 11 a.m.–3 p.m. for Marine Corps 250th anniversary live-fire demo at Camp Pendleton; expect major SoCal traffic delays.

Artillery rounds also were launched over the freeway during a rehearsal for the demonstration attended by Vice President JD Vance and Defense Secretary Pete Hegseth.

While no one was hurt, experts say the decision to fire live munitions over the freeway during the ceremony was highly unusual.

And after a half-day of back-and-forth between Gov. Gavin Newsom and the White House, it seems as if all talk of shutting down Interstate 5 in California will not take place.

An artillery shell fired as part of the Marine Corps’ 250-year anniversary celebrations prematurely detonated over Interstate 5 in California Saturday, striking a patrol vehicle with shrapnel, according to the California Highway Patrol.

A driver who died after a crash along Interstate 5 in Stockton over the weekend was a California Highway Patrol cadet, the agency said.

The U.S. military demonstration that shot live-fire artillery rounds over Interstate 5 on Saturday dropped metal shrapnel on a California Highway Patrol vehicle, resulting in damage, agency officials said Sunday.