A major military exercise involving over 50 aircraft is in full swing at RAF Waddington.
Cobra Warrior, which attracts spectators from all over the country, is designed to train RAF personnel in tactical air warfare operations.
NATO allies also take part in the annual event, including Canada, Poland, Finland and Norway.
On September 16, the participants took to the skies over Lincolnshire. The exercise will last until October 4.
Wing Cdr Colin Melvin, commander of the operational support wing at Waddington, said: “It’s a lot bigger for us than it’s been in years.
“We have several fast jet fighters and several heavy aircraft in support.
“It’s always great to see our NATO allies and partners here and have the opportunity to train together.”
Lieutenant Colonel Ben Switzer of the Canadian detachment said the exercise was a “unique and challenging experience”.
Waddington staff are leading the operation, with crews from RAF bases at Lossiemouth, Brize Norton, Coningsby and Lakenheath taking part.
Aviation enthusiasts flock to Waddington to view the aircraft.
John Smith, 83, from Nottingham, who attends the exercise every year, said: “I’m really surprised by the number of people. It’s never been this busy.”
“It seems like everyone wants to come and take a look.”
Antony Hodges, 60, from Somerset, drove four and a half hours to watch the planes fly overhead.
“It’s always worth driving there, the atmosphere is great and everyone is enthusiastic. I came to see the Polish planes,” he said.
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