An investigation is underway to find out what caused the crash as the cause is not currently clear. The Taliban have issued a statement claiming that their militants shot down the UH-60 Black Hawk. CBS News, however, claims the group "often issues claims which later turn out to be false or exaggerated". A spokesman for the Taliban, Qari Mohammad Yousuf, stated “we have weapons that can hit aircraft,” when asked to specify the type of weapon used to shoot the helicopter.
Continue reading: http://www.examiner.com/article/mitt-romney-we-owe-the-souls-who-died-afghanistan-our-unyielding-gratitude?cid=db_articles (The article includes a statement from Romney, don't take that statement as an appreciation of Romney please)