Modern Marvels: Keep Out DVD

Take a behind-the-scenes tour of Master Lock® to see how padlocks and combination locks are made, as well as how facial recognition, irises, and even vein structure can open biometric locks. Finally, meet U.S. Customs and Border Protection officers and see how they prevent contraband from entering the country. From steel nets to airspace command centers to shark cages, join HISTORYTM for this fascinating look at the numerous ways we ve learned how to say, KEEP OUT! PRODUCT DETAILS: Format: Multiple Formats, Color, NTSCLanguage: EnglishRegion: Region 1 (U.S. and Canada only. Read more about DVD formats.)Number of discs: 1Rated: NR Not RatedStudio: A&E EntertainmentDVD Release Date: June 28, 2011Run Time: 47 minutes