During the bombardment and missile strike on Tehran that would cause every person to be overcome with distress, right at those moments we would see on the television monitor that heartbeat of the Imam had not risen. We would then check his blood pressure and see no difference as compared to normal times and this showed that the Imam was really not afraid of anything.[1]
[1] Composure of the Imam during missile strikes: Dr. Pur-Muqaddas