BERNARD SHAW, CNN ANCHOR: Olympic dreams will be made or broken in Sydney, beginning September 15. Australia wants to make sure athletes and fans can concentrate on the games and not on security concerns. CNN's Hugh Williams now on the top-notch force assembled down under.</s>HUGH WILLIAMS, CNN CORRESPONDENT (voice-over): On Sydney's expansive waterways, police demonstrate their prowess. Counterterrorist frogmen emerge from the water like in a James Bond movie. Their task: protecting swimmers and sailors competing in the harbor. Police videotaped this exercise to demonstrate how they're taking aim at their target: the threat of Olympic terrorism.</s>PETER RYAN, NSW POLICE COMMISSIONER: We're a well-trained organization, highly disciplined and highly motivated, very technologically advanced here. And I think you can say that we're one of the strongest if not one of the best police forces in the world.</s>WILLIAMS: But the bombing at the 1996 Atlanta Olympics showed how even the best preparations aren't always enough. And security chiefs here say the biggest threat to the games is the lone individual, not international terrorist groups. With that in mind, security at the Sydney Olympics will be tight. All those attending events will be screened, specially-trained dogs will sniff out explosives, no stone left unturned or uninspected.</s>UNIDENTIFIED FEMALE: Over here!</s>WILLIAMS: Hostage-taking is just one of the many scenarios that security forces have spent months training for. Over 12,000 state and federal personnel are involved in the security effort for the games, but that doesn't mean all potential threats have been eliminated.</s>RYAN: I'm confident that we've put as many barriers in place as we possibly can to ensure the security of the games. But as I've said earlier, there's no guarantees at all that we've got 100 percent security. But we've done, certainly, the best as humanly possible.</s>WILLIAMS: Without a guarantee, authorities will be holding their breath and hoping their preparations are enough to keep the games safe. Hugh Williams, CNN, Sydney.
Sydney 2000: Authorities Attempt to Cover Every Contingency