2012 Singapore attacks

The 2012 Singapore attacks is a terrorist attack consisting of different dates -
 * 6 October 2012 - Exercise Heartbeat Echo, at Orchard MRT Station and ION Orchard
 * 24 October 2012 - Exercise Heartbeat Alpha, at Suntec City, Millenia Walk, Marina Bay Cruise Centre and Gardens by the Bay
 * 15 November 2012 - Exercise Heartbeat Delta, at Sentosa