The U.S. Marines have a big base in Southern California. It is called Camp Pendleton. The military uses this base for important training. This helps the soldiers practice their skills. They have a special plan for this weekend.
The plan is to fire big guns over a road. This road is Interstate 5. It is a very busy freeway with many cars. The guns will shoot from one part of the base to another. The shells will fly high in the air over the traffic.
The soldiers did a test on Friday. The test was to make sure everything was safe. The main event is on Saturday. The Marines said that the road will stay open. They want to train, but they also want people to be safe.