Shell Detonated Over Interstate 5 During Marines Event, California Officials Say NYT | Top Stories By: John Ismay, Laurel Rosenhall and Zolan Kanno-Youngs 20 October 2025 at 04:47 The mishap, during an anniversary celebration for the Marine Corps attended by the vice president and defense secretary, underscores safety concerns that Gov. Gavin Newsom voiced before Saturday’s event at Camp Pendleton. © Patrick Fallon/Agence France-Presse — Getty ImagesA warning over a highway near Interstate 5 alerted drivers about the military using live weapons on Saturday.