Iran's President Hassan Rouhani said Tuesday (January 14) the crash of a Ukrainian passenger plane that killed 176 people was an "unforgivable mistake" by the country's military. As the country deals with one of the greatest public challenges to their clerical rulers since the Islamic Revolution of 1979, Rouhani said Iran will punish "all those responsible" for what it has called the accidental shooting down of the passenger jet, Adding that the "tragic event" would be investigated properly. SHOWS: TEHRAN, IRAN (JANUARY 14, 2020) (IRINN - NO USE IRAN. NO USE BBC PERSIAN. NO USE MANOTO. NO USE VOA PERSIAN.