Hate to play devil's advocate, but it sounds somewhat similar to what Israel does with their airports, but leveraging technology to identify all details (and more than a human could reasonably do), rather than training individuals to do the same.
Methods, deployment (in terms of location) and data retention are obviously the distinguishing factors here.
Methods, deployment (in terms of location) and data retention are obviously the distinguishing factors here.
http://news.ycombinator.com/item?id=1024850 for an article on it, from around two years ago.