Researchers at Newcastle University have released this footage of controlled explosions in London Underground carriages.
The first explosion shows a decommissioned carriage similar to that targeted by terrorists on the London Underground in 2005.
The second explosion is on a prototype carriage that has been redesigned by engineers to provide better protection for passengers.
The family of a gas worker from Teesside who was taken hostage by terrorists in Algeria have spoken of their relief after the ordeal.
Darren Matthews, from Loftus, was released from the gas plant on Friday. His family have released the follow statement:
A man who allegedly threatened to bomb Asian restaurants and carry out an "Oslo-style" attack has been arrested, according to a group which monitors the English Defence League.
Northumbria Police said a 29-year-old man from South Shields, South Tyneside, was held for questioning on Saturday on suspicion of assault and possessing racially inflammatory material.
According to the EDLNews website, the man posted on Facebook that he had "got a pipe bomb just 4 Ocean Road"
He has been bailed pending further inquiries.
The writer abused Muslims and then added: "GIVE ME A GUN AN AL DO YOU ALL OSLO STYLE".
The website claimed the man held by police was a member of the EDL.