The F-35 joint program office announced this week the program has officially entered the initial operational test and evaluation phase. The program expects the testing phase to run through the end of next summer. "The start of formal operational testing is a milestone more than 18 years in the making," Program Executive Officer Adm. Mat Winter said in a Dec. 6 press release. "It is the culmination of years of hard work and dedication from the joint government and industry...