It was very quiet at the Medan Mayor's office in North Sumatra, last Monday. On the first workday of the week, probably many employees of government institutions were still with their thoughts at home and made them go home earlier. It was really quiet, not even a sound of fingers hitting computer keyboards. Then…an explosion!

The blast was loud, even for Khairil Anwar, who was about half a kilometer away from the location. Curiosity made