News At Seven-Thirty highlights: police arrested 30 people during an anti-drug operation; students in Tai Po will be subject to urine tests for 5 different drugs; East and West rail lines will be connected by the Kowloon Southern Link; more than 30 people are missing after a passenger flipped over and sank in Tanga; U.S. is playing down talk of a breakthrough in relations with North Korea; government allocated 4 pieces of land to 4 different international school operators; dozens of Watsons Water drivers and delivery workers continued their strike; HK Medical Association and HK Doctors' Union introduced new software for private doctors; government plan to install speed limiters on minibus; photo exhibition marking the 60th anniversary of PRC is at the Convention and Exhibition Centre.