News At Seven-Thirty highlights:Strong Wind Signal No. 3 in force;Mainland mothers giving birth in HK to be limited to 33,000 a year from 2012;Day two of graft trial of TVB s Stephen Chan;Greek PM survives confidence vote;Obama to announce Afghanistan troop drawdown plan; Leon Panetta confirmed as defence chief;Relocation of U.S. military base on Okinawa delayed;Ban Ki-moon re-elected U.N. secretary-general;Pan-democrats walk out of Legco in protest of by-election bill;Government says taxpayers money should not be used to improve subdivided flats;Antarctic Emperor penguin lands on New Zealand beach, entertains locals.