If you have a chance check out Alpha Dogs on Nat Geo. It's a show about one of the largest kennels for working dogs in the US (which happens to be in Indiana.) Vohne Liche Kennels is where my dh's police department get their K9's. The owner of VLK, Kenny, trains all different kinds of working dogs. He works with police, military, special forces, ect.
My dh really enjoyed watching the show since he knows all of the master trainers. He said it was a little weird seeing them and the facility on TV.