Edited sentence: During the time that they are engaged in such an operation, enemy submarines are no longer lawful objects of attack.The conduct of the aircraft commander appears to be entirely inexcusable since he must have observed the rescue operation.The fact that the US Army Air Force took no action to investigate this incident, and that no trials took place under the then-effective domestic criminal code, the Articles of War, is a serious reflection on the entire chain of military command.The order given by Richardson is a prima facie war crime.Under the conventions of war at sea any ship engaged in rescue operations, including submarines, are held immune from attack