Investigators say they will remain at the scene of a fatal plane crash in the Fens for at least the next two days.
The pilot was killed after the F-18 jet came down in farmland at Redmere, near Ely, yesterday morning.
Investigators spent the night at the crash site gathering evidence to try to work out what happened.
The aircraft had recently left RAF Lakenheath and belonged to the US Marine Corps.
David Tilbury filmed the planes as they took off earlier in the day.
A US aircraft crash which killed the pilot has raised questions over the safety of military flights in the Anglia region.
The FA-18 crash is the second in just over a year involving a jet taking off from RAF Lakenheath in Suffolk.
In October 2014 a US military F-15 crashed in Lincolnshire. On that occasion the pilot managed to eject safely.
The Spalding crash followed another accident the previous January when four US military personnel were killed when their Pave Hawk Helicopter, again from RAF Lakenheath, was brought down by a bird strike at a nature reserve in Cley-next-the-Sea on the north Norfolk coast.
Click below for Russell Hookey's report
A witness has described the moment a US jet crashed near her home.
The aircraft came down in a field shortly after taking off from RAF Lakenheath.
Hannah Bridges said: "It was obviously the plane.
"It was so loud it rattled stuff in the house. I've never heard anything like that before and we have planes fly over constantly."
"It was incredibly low and something sounded wrong.
"I think it must have come over ours and literally come down. I can't really explain the noise to you."
Click below to hear from Hannah Bridges
The last pictures of a doomed military jet have been obtained by ITV News Anglia.
The video shows six FA-18 Hornet jets taking off from RAF Lakenheath in Suffolk.
Moments later one crashed in a field killing the pilot.
An US aircraft which crashed in Cambridgeshire was one of six heading to California.Read the full story ›
An investigation is underway following an aircraft craft in Cambridgeshire, the US Airforce has confirmed.
A statement from 100th Air Refueling Wing said: "An incident involving a U.S. Marine Corps F/A-18 Hornet, which departed from RAF Lakenheath, occurred at about 11 a.m. today near Littleport, United Kingdom.
"Response efforts are under way and the incident is currently under investigation.
"More information will be released as it becomes available."
The US Ambassador to the United Kingdom has expressed his condolences following the crash of US Navy jet.
Matthew Barzun said his "thoughts and prayers" were with all involved.
The loss in Cambridgeshire today is terrible news, my thoughts & prayers are with all involved.
Debris from an aircraft which crashed in the Fens has been scattered widely over a field.
The US Navy FA-18 jet came down this morning after taking off from RAF Lakenheath in Suffolk. The pilot has died.
Debris from the plane appears to be scattered over a field just next to where the plane came down @itvanglia
A local photographer has taken pictures of a US fighter jet taking off from RAF Lakenheath, shortly before one crashed.
An FA-18 Hornet crashed in farmland this morning, killing one person.
Simon Farrow, a local photographer, said six jets flew in on Saturday and four yesterday. It is believed they were due to depart today.