By 3 News online staff
It's just one month to go until the start of the 2012 Olympic Games in London.
The stage has been set for one of the biggest ever logistical exercises in both sport and security.
Organisers are determined it will go off without a hitch - but when the Olympic park was partly opened today, it was clear there are still some concerns about potential threats.
The other big news in Britain is the Queen meeting with Sinn Fein's Martin McGuinness - also a huge security operation.
3 News