Possibly the largest rotation of military forces in United States history is about to take place, as thousands of troops prepare to relieve units that have been in Iraq and Afghanistan for as long as a year, the director of operations for the Joint Staff said here today. Air Force Lt. Gen. Norton Schwartz said the rotation will involve all varieties of active duty and reserve combat and support forces. He said the goal of the rotation will be to satisfy the needs of ground commanders for the right kinds of forces -- especially civil affairs, military police and intelligence...