The first of 16 new F-16 fighter jets from the U.S. land in Bulgaria / The first of 16 new F-16 fighter jets from the US land in Bulgaria / Netherlands says farewell to its F-16 fighter jets / Ukraine says US-made F-16 fighter jet crashed, killing pilot / Ukraine said for the first time that it used U.S.-made F-16 jet fighters to intercept drones and missiles as Russia unleashed attacks across Ukraine for a second straight day. / F-16 fighter jets spotted over Kherson Region in first such case -- official / Report: Ukraine receives first batch of U.S.-made F-16 fighter jets