The Naval Health Clinic Quantico conducted a Code White scenario during an active shooter drill in the clinic on Monday. The drill lasted 4 minutes and 27 seconds, and gave the staff and leadership aboard the base a more in-depth look at the efficiency of their safety protocols.(U.S. Marine Corps photo by Lance Cpl. Antwaun L. Jefferson/Released) - The Naval Health Clinic Quantico conducted a Code White scenario during an active shooter drill in the clinic on Monday. The drill lasted 4 minutes and 27 seconds, and gave the staff and leadership aboard the base a more in-depth look at the efficiency of their safety protocols.(U.S. Marine Corps photo by Lance Cpl. Antwaun L. Jefferson/Released)