LONDON -- The London Olympics will open just over a year from now, amid the stunning and historic backdrops of the Houses of Parliament, the Tower of London and Buckingham Palace -- all the monuments that make this city one of the world's most popular destinations.
For that very reason, these games will have a security presence like no other in the face of a constant terrorist threat.
Last Wednesday, marked the one-year countdown to the opening ceremony on July 27, 2012.
For years, London has bracing for the Olympic onslaught:
• 10,500 athletes from more than 200 countries;
• 5,000 coaches and team officials;
• 20,000 media personnel;
• Hundreds of thousands of visitors.
All for an extravaganza in the most memorable of settings, featuring 26 sports in 32 venues. It's a tall order, even for a place where the flow of tourists never stops. And it's that much more challenging just seven years after a coordinated, deadly attack on London's transit system.
The message from Mayor Boris Johnson: Don't worry. Everything is taken care of.
"With a year to go we can safely say we are ready to welcome the world," he said.
Venue construction is largely completed, tickets are almost sold out, and the government says the games will come in under the $15 billion budget. The Olympic Park is changing the face of a previously rundown area of east London.
Athletes will be competing in iconic venues and locations across the capital.
Fans will see Usain Bolt sprinting down the track in a new 80,000-seat Olympic Stadium, beach volleyball players dueling on the sand in Horse Guards Parade, triathletes splashing in Hyde Park's Serpentine, Roger Federer and Rafael Nadal stepping back onto Centre Court at Wimbledon, archers firing their arrows at Lord's cricket ground and showjumpers clearing fences at Greenwich Park.
Underpinning the sports festival will be one of the biggest security operations ever mounted.
Security at the Olympics has been a critical issue ever since the 1972 Munich massacre, even more so after the Sept. 11, 2001 terror attacks. A day after London was awarded the games in 2005, suicide bombers attacked London's transport network, killing 52 people.
The British government is planning for the national terror threat to be "severe" during the Olympics, meaning an attempted attack is highly likely. Security screenings for spectators will be tight and widespread, with airport-style checks at most venues. Away from the competition sites, protecting the Underground subway network and public places will be a major challenge.
"We're already seeing chatter from terror groups regarding the 2012 Games but none of it seems defined at the moment," said a British security official, speaking on condition of anonymity because of the sensitivity of his work. "This is to be expected though with an event of this magnitude."
About 12,000 police officers will be on duty each day of the July 27-Aug. 12 games, which have a security budget of $770 million.
British officials say the country has the experience and know-how in dealing with terrorism.
"I am as sure as you can possibly be one year out from the games that we have done everything that we need to deliver a safe and secure games," Olympics Minister Hugh Robertson said.
Extra surveillance cameras will also be installed around the Olympic Park -- Britain has some of the most extensive surveillance powers in the world and has become a leader in what critics call "Big Brother" techniques with its more than 4.3 million closed-circuit cameras in operation.
Organizers are determined to keep security from being overwhelming. They point to the successful policing of the royal wedding in April of Prince William and Kate Middleton, when a million people lined the procession route from Westminster Abbey to Buckingham Palace.
"We're very good at policing in a friendly and a discrete way," organizing committee leader Sebastian Coe said. "The real challenge is to maintain security to protect the athletes, protect people, protect assets, but at the same time having people leaving your city feeling they haven't been pushed from pillar to post."
Despite the tight security, London wants these games to be a party.
While the Beijing Olympics were marked by a sterile atmosphere, London promises knowledgeable fans, packed venues, "live sites" with giant screens around the city and a "home" crowd of citizens from different nationalities, cultures and backgrounds. It will all kick off with an opening ceremony created by "Slumdog Millionaire" director Danny Boyle.
"It won't be the same as Beijing," Johnson said. "I've always said it would be different. It would be splendid. It would be brilliant. It would be brilliant in an entirely different way."
While Athens struggled to the last minute to finish venues for the 2004 Olympics, and Beijing was battered for its record on Tibet and human rights ahead of the 2008 Games, London has enjoyed a comparatively smooth and crisis-free ride so far.
On the down side, the British public has complained bitterly about the ticket sales process, and London's strained public transport system faces tough challenges to keep the city moving smoothly during the games.
Coe, a two-time 1,500-meter Olympic gold medalist and former 800-meter record-holder, surveys the year ahead like a runner entering the "midway back straight" on the final lap.
"I know from 800s that's where it's won and lost," Coe said in an interview with The Associated Press. "I don't kid myself. This is a crucial part of the race."
"If we compare with previous games, we are well advanced and this is a very comfortable position," Denis Oswald, the Swiss IOC executive board member who leads the coordination commission for London, told the AP. "This is especially the case when you don't have to worry about construction and you can really concentrate on the operations side."
Olympic organizers say 88 percent of the venues and infrastructure work for the games has been completed. The Olympic Park in Stratford has a set of gleaming new venues. The aquatics center, with its sweeping wave-shaped roof, also has just been completed.
The 560-acre Olympic Village is the centerpiece of a massive regeneration project that is turning a former industrial wasteland into a huge urban park. Bordered by a giant new shopping center and new transport links, the park is designed to serve as a vibrant new neighborhood after the games.
Ticketing remains a sore point. With 6.6 million tickets available to the British public, organizers received 22 million requests in a heavily-criticized first lottery-style allocation -- with 1.2 million applicants coming up empty. Another 750,000 tickets were sold in the first phase of the second sales. A total of 3.5 million have now been sold, with tickets remaining only for soccer, volleyball and wrestling.
"No city has ever sold tickets at that rate," Coe said. "No games, no sporting event in my lifetime can point to that kind of demand."
The IOC singles out transportation as London's biggest Olympic challenge. Organizers are calling these the "public transport games," with spectators traveling to venues by Underground, bus and the new high-speed "Javelin" rail service between St. Pancreas station and Stratford.
Billions of pounds have been invested in public transport upgrades. A system of Olympic traffic lanes and routes is still being finalized.
"Transport is a challenge in London in normal times as well, so when you add 300,000 people who are moving from one place to another, it doesn't help the situation," Oswald said.
Citing the transportation problems that marred the 1996 Atlanta Olympics, Coe understands London's reputation would be severely damaged if the games are mired in traffic gridlock and travel chaos.
Said Coe: "We know this has to work."