ALL that summer Rydell and Durius had been night security at the Lucky Dragon, a purpose-built module that had been coptered into this former car-rental lot on the Strip. Before that, Rydell had been night security at the Chateau, just up the street, and before that he'd driven a wagon for IntenSecure. Still farther back, briefly and he tried not to think about it too often, he'd been a police officer in Knoxville, Tennessee. Somewhere in there, twice, he'd almost made the cut for Cops in Trouble , a show he'd grown up on but now managed never to watch.