Cpl. Juan Vargas, a military police officer with the

Cpl. Juan Vargas, a military police officer with the Provost Marshal’s Office and a Los Angeles native, watches as Cpl. Kevin Roberson, a small arms technician with Headquarters and Headquarters Squadron and a Sacramento, Calif., native, performs a balance test during a sobriety test class aboard Marine Corps Air Station Miramar, Calif., July 10. Roberson had volunteered to take part as a test subject in PMO’s first wet lab for the sobriety test class.