In this intriguing program from National Geographic, Popular Science editor Jake Ward ventures inside one of America's most fascinating manufacturing facilities. Located just outside Los Angeles, Plant 42 is home to many off-the-books military projects─the details of which are jealously guarded by the U.S. government. See what you've not been allowed to see...until now! 45 min. Widescreen; Soundtrack: English Dolby Digital 5.1; Subtitles: English.