Officers are painstakingly searching for clues as to why a HH-60G Pave Hawk out on a military training exercise in Cley, north Norfolk, crashed into marshes, killing all four air crew members on board.
The search for clues is set to continue for "many days" as police prioritise the recovery of the bodies of the crew. ITV News' Nina Nannar reports from Cley on how the investigation is progressing.
More top news
The biggest ever airlift of rescued lions, including Zeus and Shakira, will take place on Friday - involving 33 of the big cats.
British Summer Time may have begun weeks ago, but commuters in northern England and Scotland woke up on Friday to yellow warnings of snow.
Protests in California caused chaos in the streets outside a Donald Trump rally.