The World Tonight - 07/07/2010

The final investigation into 'climategate' clears scientists of allegations of manipulating data Are the alleged Russian sleeper spies in the US about to be swapped for people held in Russia? And five years on from the July 7th London bombings we ask if we are better protected now? We report from a special World Tonight-Chatham House-ESRC conference chaired by Robin Lustig With Ritula Shah and Robin Lustig.