IN PICTURES: World's biggest disaster simulation exercise takes place in Portsmouth
About 3,000 people took part in the world's biggest disaster simulation exercise in Portsmouth earlier this week.
The annual SIMEX Series exercise, which started in 2012, comprises a mix of live, simulation and command and control events in order to test both national and international emergency response mechanisms.
To see our picture gallery click on the link at the top of the story or the icon on the main picture.
To read more about what happened click here.