Possible Clues:

• Weapon at disposal of one mob after another?
• Explosive causing huge cloud
• According to the code, 'Little Boy' from a rebellious crowd is in a grave place
• A grave old doctor means to be destructive
• A treacherous mob from beyond the grave is hugely destructive?
• Nuclear device
• Article on Tommy and Bobby hiding Bond's boss is highly destructive
• Having reached zero megabytes twice, it's very destructive
• Nuclear explosive device
• It can kill so many first off, Pat ... ring the doctor, again!