Doctors Without Borders(MSF) said the Sunday it has closed the trauma centre, seen as a lifeline in a war-battered region with scant medical care, and demanded an independent probe into Saturday's devas mis tating air raid. US President Barack Obama has promised a full investigation but the internation outrage over the deadly incident has piled pressure on Washington for a pro more transparent probe. "Under the clear presumption that a war crime has been committed, MSF demands that a full and