Currently 9000 – 10,000 police officers in SWAT gear mobilized in Watertown/Boston.

Just so you realize how many cops they can mobilize in 24 hours.

WATERTOWN — Police have shut down transportation in the Boston area and expanded their search for the second suspect in the Boston Marathon bombing, the man they call “White Hat”. Overnight, ashootout with the two bombing suspects ended with one dead and the other on the loose.

In press conference early this morning, police announced that residents in surrounding towns, including Allston-Brighton, Newton, Arlington, Waltham and Cambridge should stay at home and businesses should remain closed. Police warn residents to keep their doors locked and open doors only for uniformed police.

“All MBTA services (buses and subway) have been shut down,” the Massachusetts Emergency Management Agency posted to Twitter.

Police converged on the Arsenal Street neighborhood in Watertown, with approximately 9,000 to 10,000 police officers eventually flooding the area, and are now conducting a door-to-door search.