Sentence:  Before dawn, NEST <WSD>black-bagged</WSD> Ivan's building — not the Nuclear Emergency Search Teams, their shadows whose S stands for Strike. They pulled all hazmat out of the medical imaging office, substituted fake material, and broke the machines so nobody will wonder when they don't work. 
Meaning of the word marked with <WSD> tags:  To break in to a place without authorization as part of a clandestine operation.