Behind The Shield

"Bevell something feels not right."
"Ya, something still feels not right" Bevell adds, "We should do a secondary search."
You agree and continue searching the school. You get to the administration office and start searching. You open up a file cabinet and find the master bomb.
"OH SHIT!!! Bevell look at this."
Bevell hurries over. What the both of you examine is a 10 pound nitrogen tank and a clear tank filled with cumbustable hydrogen fuel when mixed together would blow the entire office and surounding class rooms.