Two crew members were killed after two firefighting helicopters collided mid-air during wildfire operations. A Danish pilot and a Greek liaison officer died, while two others survived with minor injuries. The aircraft, leased from Australia, have now been grounded nationwide as authorities investigate the devastating collision's cause.

Two firefighting helicopters collided on Sunday while battling a massive wildfire in Greece, as authorities struggled to contain fast-moving blazes that have destroyed more than…

Two crew members were killed on Sunday when two helicopters battling a wildfire collided in midair in the Psatha area, on the boundary between Attica and Boeotia northwest of…