Why Do Security Cameras Always Fail When You Need Them to Catch Terrorists?

British Transport Police have recovered nearly a million used tickets from barriers across the rail network, hoping some will carry the bombers' fingerprints as they travelled into London.

But the investigation received a serious setback when it was discovered the CCTV cameras on the bus that blew up were not working so detectives will not get vital images of the bomber.

One senior Yard source said: "It's a big blow and a disappointment. If the cameras had been running we would have had pin-sharp close-up pictures of the person who carried out this atrocity.

"We don't know if the driver forgot to switch them on or if there was a technical problem but there are no images."

The bus had four cameras - one covering people getting on, the second at the exit doors and one on each deck scanning the length of the vehicle.

But the anti-terrorist squad are confident that other CCTV footage will help nail the three other terrorists.

Senior sources at the Yard said they were seizing film from an estimated 2,000 cameras in the biggest operation of its kind.

What an amazing coincidence. Four cameras on the bus, none of them worked.

This is amazingly like the multiple airport security cameras on 9/11 that apparently failed to catch images of the hijackers before they got on the planes...