News at Seven-Thirty highlights:WHO has lifted its pandemic alert to Phase 4; WHO says "screening doesn’t work" for swine flu; HK government advised not to travel to Mexico unless aboslutely necessary; WHO confirmed no confirmed or probable cases of swine flu in China; Yemeni coast guard forces have freed an oil tanker from Somali pirates; Transport Department has launched a new electronic public enquiry system; Customs has tracked down a BitTorrent peer-to-peer file-sharing software; MA chief warned that premature disclosure of confidential information may triggered legal challenge; the government will start issuing bonds on a regular basis; a large-scale flood rescue exercise was carried out in Tai O; project in Italy to save endangered bird species by building artificial nests has promising results.