Key facts
- Military exercises are occurring across Southern California.
- The exercises involve sounds of gunfire and helicopters.
- Training is taking place at empty buildings.
- Residents have expressed concern over the exercises.
Intense military training exercises across Southern California have caused unease among residents. The drills, which include sounds of gunfire and helicopters operating during the night, are being conducted at empty buildings. The exercises have left some locals on edge. Military helicopters, simulated gunfire and flash grenades rattled Pasadena, Long Beach and other Los Angeles-area suburbs this week.