EDWARDS AIR FORCE BASE, CA -- F-35 Joint Strike Fighter testers here are preparing to start in the spring a graduated test effort, which allows the program to begin operational testing before all of its jets are configured with the required modifications. Lt. Col. Nick Ihde, commander of the 31st Test and Evaluation Squadron, told Inside Defense in a Nov. 30 interview the plan was approved last month and the program will begin conducting test exercises that count...