but for mary craddic it's a reminder of what it was like at the navy yard just a block away.e remembers when a loan gunman stormed her military complex killing 12 people before shooting himself. >> it took an hour or so before anything, you know, or you get that help. >> reporter: that's part of the reason police agencies from d.c., maryland and virginia gathered today for simulated terror attack trainings in six different locations. >> we want to make sure we can respond effectively and efficiently. >> reporter: for people catching a glimpse of this drill in d.c. which included hundreds of law enforcement, and actors pretending to be wounded it was. >> even the military police, i see the emergency -- so i think it's a wonderful thing. it's always good to have a practice, so when comes we are prepared. >> the really good way for different agencies to work together to iron out any kinds of kinks, to highlight strengths, to figure out weaknesses and to work on those in concert. >> reporter: the metropolitan washington council of governments organized this training that spans th