division practices assault tactics on old subway cars. they re preparing for a mumbai scenario when terrorists attacked in small units. but force doesn t work unless you know where to focus it. this $100 million command center in lower manhattan monitors more than 1700 cameras installed after 9/11. they re programmed with ed withmed with algorithms so they can automatically detect patterns. if someone leaves a bag in front of a key building or a car circles a block repeatedly the cameras here set off an alarm. the images can also be reviewed with a specificity that might shock new yorkers who like to think they re anonymous in the big city. we were shown the facility when it first became operational in 2008 by then deputy commissioner for counterterrorism. if i put on a black overcoat