Aerial pictures show the site of the US military helicopter crash, which killed four members of the US Air Force.
The US Pave Hawk helicopter crashed while on a training exercise in Norfolk. A second helicopter - which was also on the exercise - remains at the scene after landing to help following the crash.
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Uplifting messages greeted commuters on the London Underground a day after the terror attack in Westminster.
Faith leaders from across London say religious communities will "stand together" in the wake of the Westminster terror attack.
Pc Keith Palmer was among the three people killed yesterday in the Westminster terror attack.