7/7 medic: 'It's the silence that gets you'
On 7 July 2005, London's Air Ambulance was part of the emergency response when the transport network was attacked.
At 08:49 BST, three devices were detonated on London Underground trains at Aldgate, Edgware Road and Russell Square. A fourth device exploded on a double-decker bus in Tavistock Square an hour later.
Fifty two people died, hundreds more were injured.
Dr Gareth Davies, who led the response at Aldgate, said the day changed everyone involved, forever.
Here, he describes what it was like to attend the scene; how eerily quiet it was, and why he spoke to those who had died.
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