AIRRAID

Cause of a W.W. II siren

• Attack from above

• Attack from on high

• Blitz

• Blitz activity

• Bomb-dropping attack

• Bombardment

• Cause for a siren

• Certain assault

• Reason for a blackout

• Reason for a blackout, perhaps

• Reason for a siren

• Reason for some sirens

• Reason to take shelter

• Siren indication