President Tony Tan Keng Yam speaking to civil servants, including Immigration and Checkpoints Authority Checkpoint Inspector (2) Zarina Zainee at an Istana reception yesterday evening. Some 500 public officers attended this year's reception, hosted by Dr Tan. The event is part of Public Service Week, during which 143,000 public officers working in 16 ministries and more than 50 statutory boards will renew their pledge to serve Singapore and Singaporeans.