Marines from Tustin, El Toro and Camp Pendleton who have gone to the Mideast are in for slightly bigger paychecks. . . . Enlisted personnel make an extra $8 to $22.50 a month for serving in Saudi Arabia. Officers get nothing extra, but everyone is eligible for a $110-a-month "danger pay/hostile fire" bonus if shooting starts or is imminent. And when is it "imminent"? The secretary of defense decides.