JUNE 15 (Reuters) — Twenty-five private pilots established a new world record on Saturday (June 6), after flying in formation over the Russian town of Istra. A video posted to a social media website showed the helicopters taking off before creating a diamond-shaped formation in clear skies. Artem Kurpitko, one of the pilots involved in the airshow, said he came up with the idea a year ago and began training after inviting other private pilots […]