In all, there will be more than 100 cameras installed at the port and crime hot spots. The cameras are programmed to recognize certain suspicious movements like fights, crowd gathering and climbing. If these movements are picked up, the cameras will trigger an alarm, prompting a security or police officer to take a better look.
"This technology will let us catch things while it happens," Ms. Schneider said, indicating it will help both police and prosecutors.
The District had plans for a similar video surveillance system. But in May, the city council cut funding in Mayor Adrian M. Fenty's proposed homeland security budget, killing the plan.