The helicopter which crashed in Norfolk was a HH-60G Pave Hawk helicopter, it is an updated model of the US Black Hawk helicopter and is primarily used to conduct personnel recovery operations in hostile environments.
It is also used in civil search and rescue, medical evacuation, disaster response and humanitarian assistance.
The Pave Hawk is 64 foot long and can travel at speeds of up to 184 m.p.h (159 knots). The crew usually consists of two pilots, one flight engineer and one gunner.
The unit cost of the Pave Hawk is $40.1 million.
Source: US Air Force
More top news
The Kremlin has released pictures of Russian President Vladimir Putin working out at the gym with Prime Minister Dmitrty Medvedev in Sochi.
Cloudy skies for many this Bank Holiday Sunday.
The brother of British holidaymaker Steven Cook who vanished in Crete 10 years ago has his family are "sure he's alive".