News At Seven-Thirty highlights: Wen Jiabao paid tribute to victims of the earthquake and tsunami that hit Japan; Barack Obama and Benjamin Netanyahu had talks about Israeli borders issue; Dominique Strauss-Kahn was put on strict house arrest; 2 pedestrians were injured in Yuen Long after a bottle of cleaning fluid fell from a building; Leung Chun Ying proposed ways to help people buy their own homes amid surging property prices; top government officials sought to diffuse a row over comments made by Chief executive; Mother of Ai Weiwei called for greater transparency in his case; 2 people died and 16 injured when a factory in Chengdu exploded last night; U.S. says documents showed al-Qaeda was planning attacks on oil tankers last year.