The first time the Marines went back to work at the place where the attack happened, they paused and listened.
Focused and solemn, the Mike Battery Marines walked through the entire U.S. Naval and Marine Reserve Center. Then Maj. Chris Cotton explained how the attack unfolded weeks earlier on July 16, 2015, when a gunman stormed into the facility, mortally wounded a U.S. Navy sailor and killed four Marines.
Some of the Marines escaped that day by jumping a fence, clearing civilians out of the Riverpark and then hiding in a maintenance building. Others hid in offices, crouching behind desks or bracing doors shut.