It seems the heat and humidity are proving a challenge for the world famous Lincolnshire-based Red Arrows as they continue their North American tour.
Members of the team are halfway through their 11-week deployment and have performed displays and fly-pasts over several iconic landmarks, including Niagara Falls (pictured) and the Statue of Liberty.
Red 3, Sqn Ldr Mike Bowden, says: "The heat has a massive effect on the performance of the aeroplane...Taking off to the way the aircraft feels when we're doing manoeuvres.
"Even on the ground, when you're pulling over the canopy, it's like a greenhouse," he said.
The team is currently in Texas, with displays also due to take place in Seattle, Vancouver and Los Angeles to follow in the coming weeks.