Amid rising conflict between the United States and Turkey, the latter has announced to purchase Russia's Su-35 and Su-57 fighters 'if the United States freezes the sale of F-16 fighter jets', news agency Sputnik reported on Monday. According to the news agency, Turkish Presidency of Defence Industries, chief Ismail Demir, during an interview with Kanal 7 broadcaster, said that the country would always maintain an option and would probably use it if the US government freezes the sale of F-16 fighter jets. Further, the minister said that the country would go beyond its limit if there would be any threat...