Prompt, credible and impartial investigation
Hilary Clinton said that the US had agreed to a prompt, credible and impartial investigation on the Israeli attack on Aid Ship heading to Gaza. This is her response to the UN's call for an investigation. I am wondering why the UN did not call for a prompt, credible and impartial investigation. And I am wondering why the US, UK and the South Koreans went ahead on a partial investigation without any independent party involved. What is the difference between the type of investigation conducted by the US, UK and South Koreans and a prompt, credible and impartial investigation? Was it prompt, was it credible, was it impartial?