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Thank you. It's the morning of July 7, 2005, and the streets of London are busier than usual.

An hour ago, an incident involving the London Underground forced the evacuation of the entire network. At this stage,

no one's quite sure what's going on, but there are thousands of frustrated commuters

still spilling into the city's crowded sidewalks and then on to buses. As the number 30,

a bright red double-decker bus, pulls up to Houston Station, dozens get on.

And once the doors close, the bus's driver, George, pulls away from the station, steering back into traffic.

As he focuses on driving the bus, George can't help but wonder what's caused this morning's

chaos. In the distance, he can hear sirens, and some people on the streets seem frightened.

He's heard some chatter about explosions in the underground tunnels, perhaps caused by problems

with the power grid, but no one really knows for sure.

All anyone cares about now is getting places on time.

So George tries to shut out the noise of his crowded bus and concentrate on driving his passengers

to their destinations safely and efficiently. But only minutes into his journey, just as he

drives past the headquarters of the British Medical Association, George's world is torn apart.

An explosion on the upper level of number 30 blows the roof off the bus, sending twisted steel crashing into the street.

George is thrown forward by the force of the blast, but he's held safe by his seatbelt.

Many of his passengers, however, are not so fortunate.

As he looks around, disoriented and in pain, the veteran driver sees blood everywhere, on people's faces,

...