essential to keeping the peace. >> we let our guard down for one moment, stop observing and interacting, tension can rise. we could have a volatile situation here. in the blink of an eye, it can change. >> we saw firsthand what lieutenant ayers meant. we caught him joking around with an inmate. >> does it qualify to wear shorts with legs like that on the track? >> we'll see what it looks like when you're in your 50s. >> i have about 20 years. >> i'll carry you on my back. >> a piggy back ride? a piggy back ride? >> that's all. >> but only moments later, when two inmates flash nazi signs right in front of both him and our camera, the lieutenant is no joking mood. >> huh-uh. come here. you two, come here.