AS soon as the school bell rang, marking the end of the school day, the students at elementary schools SD Negeri Percontohan 015 and SD Negeri 010 on Jalan Blustru 5, Mangga Besar, Jakarta, rushed out of their classes. Although the day was relatively hot, they walked happily to the gate, chatting.

However, the happiness of the hundreds of the students using one building was short-lived. From the school’s gate suddenly there was a voice shoutin