The Straits Times' News In A Minute: Nov 18, 2015

In The Straits Times News In A Minute today, we look at:

* Scenarios of terror attacks were played out at several areas across Singapore this morning, as part of an annual anti-terror exercise to test the readiness of the Home Team and the community. 

* The Singapore Police Force has said that a WhatsApp message about a national security lockdown to be conducted in Singapore is false.

* National water agency PUB will test out a smarter flood detection system using real-time footage when the North-east Monsoon hits next month.