More uncounted deaths in Iraq: The United States launched many more failed airstrikes on a far broader array of senior Iraqi leaders during the early days of the war last year than has previously been acknowledged, and some caused significant civilian casualties, according to senior military and intelligence officials. Only a few of the 50 airstrikes have been described in public. All were unsuccessful, and many, including the two well-known raids on Saddam Hussein and his sons, appear to have been undercut by poor intelligence, current and former government officials said.