World-renowned firearms expert Jeff Cooper, founder of the Gunsite firearms training center in Paulden, died Monday afternoon at his home near the training center. Cooper, 86, had been battling several health problems in recent years. The family plans a private burial ceremony and will announce a memorial ceremony at the National Rifle Association Whittington Center in New Mexico in the near future. Cooper had been a member of the NRA Board of Directors. Born on May 20, 1920, in Los Angeles, as John Dean Cooper, Cooper who always went by "Jeff," earned a master's degree in history and taught history....