BP is to pay $4.5bn (£2.8bn) to US authorities to settle claims relating to the Deepwater Horizon oil spill disaster in the Gulf of Mexico in 2010 . It is the largest fine in US history.
Two BP supervisors will also face manslaughter charges over the deaths of 11 workers.
ITV News' Washington Correspondent Robert Moore reports.
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Hundreds of pupils from Alperton Community School in Brent, London,cheered and waved flags as Andria Zafirakou arrived holding the prize.
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Among those murdered was Keith Palmer, an unarmed constable who "did his job and never wanted any fuss."