gripping video that s just gone public has the pentagon taking a second look at a deadly and controversial u.s. helicopter assault in iraq that left nine people dead, including two journalists. you saw the video here in the situation room this week, but now there are new questions about whether the helicopter crews followed the pentagon s rules of engagement. cnn s mohammed jamjoom is in baghdad. he s been talking to the family of one of the journalists. but let s begin with our pentagon correspondent, barbara starr, she s here. the incident is being ve investigated because it s causing a huge uproar. a u.s. military official is telling cnn, quote, we are looking at this matter in its entirety. reporter: u.s. military lawyers are now scrutinizing this 2007 video, showing an attack by apache helicopter gunships in baghdad asking themselves if an initial