NASHVILLE, Tennessee (AP): Several concerts on the Dixie Chicks' "Accidents & Accusations'' tour have been canceled after slow ticket sales, but the group says it has replaced them with other dates. Kansas City, Houston, St. Louis, Memphis and Knoxville are among 14 cities no longer on the original schedule released in May, according to a revised itinerary posted Thursday on the Dixie Chick's Web site. Other shows, including Nashville, Los Angeles, Denver and Phoenix, have been pushed back to later dates. The North American leg of the tour kicked off July 21 in Detroit. Billboard magazine and other trade publications...