The guards look down and shine a flashlight into the shaft but though they hear some noises, they don't see David and Megan. David accidentally blasts a hole in the wall and discovers a room which the two of them enter. David discovers it is not on the building schematic and Megan says it is locked with a code secured door. They remove some data chips and documents then proceed on their original mission, though they have to rush now since Prof and Abraham had to kill some guards. They grab some power cells, and take lab coats to use as disguises for their escape. Their explosives start blowing up, and David and Megan enter the corridor wearing the lab coats and fake security badges, hoping to escape in the chaos. Megan tells a guard that an Epic was using energy blasts. The Reckoners also detonate explosives that distributed leaflets proclaiming their invented Epic, Limelight, was calling out Steelheart. After the building is evacuated, the Reckoners set off the remaining explosives, but the building doesn't collapse until David detonates his pen activated bomb.

-Summary
http://coppermind.net/wiki/Steelheart/Summary#Chapter_1