Riyadh, Rabi'I 12, 1436, Jan 3, 2015, SPA -- Security Units at King Abdulaziz Air Base, Eastern Sector, have conducted a drill yesterday, in collaboration with the Eastern Region Emergency Force, a Defense Ministry official source Said. During the hypothetical drill, vocal-like bullets were used, the source said, adding that the drill was done in the context of the training plan to upgrade the readiness and capabilities of the security units. -- SPA 00:52 LOCAL TIME 21:52 GMT www.spa.gov.sa/w