By Ray Furlong
BBC News, Berlin
German police have carried out a mock evacuation of the Olympic stadium in Berlin as part of preparations for the World Cup next year.
The stadium, built for the 1936 Olympics, has been renovated
Around 1,000 fans were evacuated from a single block of the stadium - venue for six Cup matches including the final - in a bomb alert exercise.
Hertha Berlin football club fans volunteered to take part and the idea was to ensure maximum realism.
Families with children and people in wheelchairs took part.
Some people were also deliberately obstructive, refusing to follow police orders.
One fan even had a fake heart attack.
In one exercise, a special bridge was constructed to evacuate the fans over a tunnel and onto the pitch.
Police spokesman Ky Knoller said he was broadly satisfied, but that the police wanted to be quicker the next time they practise this next year.
He added that the police estimate for evacuating the whole stadium, which has a capacity of 75,000, is half an hour.
The German authorities are taking the possibility of an attack on next year's World Cup very seriously.
At some stadiums, they will even be deploying robots which can detect explosives, gases and chemicals.