Orvel Ronk, an antiterrorism officer for Marine Corps Base Quantico, gave an active shooter and workplace violence brief to Marines of the Maintenance Logistics Branch on March 6, 2014. Ronk said that awareness is the best protection against an active shooter and workplace violence. - Orvel Ronk, an antiterrorism officer for Marine Corps Base Quantico, gave an active shooter and workplace violence brief to Marines of the Maintenance Logistics Branch on March 6, 2014. Ronk said that awareness is the best protection against an active shooter and workplace violence.