Release the name of the officer who gunned down an unarmed teenager or details of the investigation. Protesters push. His parents plead. Still no answers. Why . Painful new details this morning about the circumstances surrounding Robin Williams suicide and recent battle with severe depression that he fought and lost. Good morning, everyone, im john berman. Were midway through the week. Im michaela pereira. Those stories and much more ahead at this hour. Were going to go back to iraq. U. S. Official say 130 more u. S. Marines and special Operations Forces will bolster the already hundreds there advising iraqi troops in their fight against isis militants. Were learning this morning those new troops could assist from the ground in an air evacuation of the thousands of iraqi minorities trapped on mt. Sinjar. Officials insist that any Ground Support would have a humanitarian focus not a combat focus. The latest Development Comes as u. S. Military planes drop food and water to yazidis. Meanw