Police sniffer dogs train for 2012 Olympic security duties
15 October 2010 Last updated at 07:12 BST
As London prepares to host the Olympic games in 2012, extra police sniffer dogs are being recruited to increase security.
Eight dogs and their handlers have begun a 10-week course at the Metropolitan Police dog training centre in Kent, learning to detect explosives.
The dogs will then gain on-the-street experience before being deployed at airports, hotels and venues in 2012.
Danny Shaw reports.