Who gave the order NOT to shoot it down?

I wonder who gave the order not to shoot it down. Clearly the United States Navy and Japanese military were poised with anti-missile missiles ready to shoot the missile down but for some inexplicable reason they chose not to.

Orders like that can only come from the top. The VERY TOP. Seriously only the Commander in-Chief of the US military could have given that order. President Obama.

But why?

American AEGIS missile warships were positioned off the North Korean coast to shoot the missile down but inexplicably, did not.