How many Afghan kids need to die to make the news?

The number of Afghan boys gathering firewood killed by a March 1 U.S./NATO helicopter attack in Kunar Province: Nine. The number of stories about the killing of the nine children on ABC, CBS or NBC morning or evening news shows (as of March 6): Two. One was an 80-word report on NBC Nightly News (3/2/11), the other a brief ABC World News Sunday story (3/6/11) about Afghan president Hamid Karzai's "harsh words for the U.S." after the "mistaken killing of nine Afghan boys in an airstrike." On the PBS NewsHour? Two brief mentions (3/2/11, 3/7/11), both during the "other news of the day" segment. On NPR? Nothing. On the"liberal" MSNBC? Zero. Fox News Channel? Zero.