It's time for “Second Line Defense” offering, an F-35 Yearbook. In its 62 page document is presented a clean and positive view for the F-35 during 2015. No negatives or mishaps are reported while it becomes the hope of the program as reported. Having no hull losses in 2015 or epic failures is a clean year in itself.
Reading the pages (report link found bottom of page) shows F-35 hopes for the future from 2015 performance. Includes an understanding definition for concurrency.