A Russian aviation blogger was killed in a fatal air defense error after his ultralight aircraft was mistaken for a Ukrainian drone and shot down. Pavel Koshkin and his passenger, identified as Vadim, died last Friday when their Czech-manufactured Alto NG ultralight aircraft was struck while flying near Kolomna, southeast of Moscow, independent Russian media outlet Mediazona reported.   JOIN US ON TELEGRAM Follow our coverage of the war on the @Kyivpost_official . The crash site lies close to a