Related Clues:

• All back graduate catching gang leaders marching on TCD - the fall-out from this is deadly
• Explosive device with rapid release of nuclear energy
• The first one was dropped on Hiroshima
• Detonation of 7/16/45
• Rush after a cat -- it could cause immense damage
• Manhattan Project project (2 words)
• Einstein referred to his endorsement of it as 'one great mistake'
• A male duck nibbling crest of milkweed that goes up like a mushroom
• Little Boy, e.g
• According to the code, 'Little Boy' from a rebellious crowd is in a grave place
• Colloquial term for a nuclear weapon
• Manhattan Project project, briefly
• Arm identified by type of blood round bones