According to the Associated Press, U.S. Vice President Watson inspected the Penneldon camp in California on the 18th, the military performance of real-time ammunition shootings in the air on Interstate Road No. 5 sparked controversy. California Governor Newson was unhappy about this, saying that he had to order the closure of parts of Interstate Road No. 5 because of security considerations, and he also criticized the federal government's move "disregarding public security".

USA Today quoted the California Highway Patrol as saying that US Vice President Vance and Defense Secretary Hegseth will hold an event at Camp Pendleton to commemorate the 250th anniversary of the founding of the US Marine Corps. From 11 a.m. to 3 p.m. local time, some sections of Interstate 5 will be closed.

The Associated Press said that this exercise, held to celebrate the 250th anniversary of the founding of the US Marine Corps, was originally scheduled to include amphibious vehicle demonstration and beach assault. However, the controversial part is that the exercise plans to let live ammunition artillery shells fly over Interstate 5, which has an average daily traffic of 80,000 passengers and a freight volume of $94 million. "Firing live ammunition over a busy highway is not only wrong, but dangerous," Newsom said in the statement.

U.S. Navy Marine Corps officials said the exercise was ¡°safe.¡± U.S. Navy Corps Captain Drebelbis said the base was undergoing regular fire training almost every week and that the exercises did not endanger drivers on the road. Drebelbis also said the exercise was ¡°fledged after weeks of careful planning¡± to ensure each stage was successful. Wance spokesman William Martin criticized Newsen for ¡°misleading the public¡± in terms of security risks, adding: ¡°If the governor of Newton wanted to oppose training to ensure our military¡¯s combat capabilities, then please.¡±

Despite the U.S. military's repeated promises, the California transportation department still decided to close the 27 km highway section before and during the exercises on the basis of the activity organizers' demands to set up "real ammunition shoot" warning signs on the roadside, the move caused severe traffic congestion on the morning of 18th, and the inter-city railway service running in parallel with Interstate Road 5 was also forced to cancel.

Darrell Isa, a Republican congressman representing the electoral district, criticized Newton¡¯s blockade as ¡°malignant propaganda,¡± while Matt Rocco, a spokesman for the California transportation department, said the blockade was entirely ¡°a result of military activities under the White House command.¡±