onearmofhydra:

Night settled on the city of Cambridge and the activity level in the city slowly died down as the hours of the night progressed. Midnight came and went and the minutes and hours rolled slowly by. By three am there was almost no activity on the sidewalks and an occasional car rolled down the street.

The quiet of the city night was shattered by a loud explosion at the location of 491 Broadway. The explosion sent brick and mortar in all directions and the concussion blast set off the alarms of nearby cars. Men in yellow uniforms with full yellow helmets on poured out of four nearby transports and rushed into the hole in the side of the building created by the explosion.

The men in yellow weren't the only ones who were interested in getting into the renovated firehouse in Cambridge. Another small team had been sent to retrieve a certain device and schematics for it. That team wasn't going in by the gaping hole created by the explosion.