Imagine if 30 people were killed every day by car bombs in US cities. Monday, 30 dead in Denver. Tuesday, 30 dead in San Francisco. Wednesday, 30 dead in Philadelphia. You get the idea.
Now scale that roughly relative to population size. Make that 300 dead per day. Every day. Would the lead story on the evening news be about all the people who weren't blown up that day? No. The country would be completely hysterical.
As he has pointed out elsewhere, the issue isn't that life goes on in a combat zone. Of course it does, but that's not the central story. The central story is that, despite continued efforts, the security situation keeps deteriorating. Go watch that Lara Logan video again, because she's absolutely right. Before we get to read a bunch of stories with the headline: "U.S. Troops Paint School," we need to read a bunch of stories with the headline: "Security Situation Improving."