News at Seven-Thirty highlights: thousands of people took to the street ahead of 20th anniversary of the June 4th Tiananmen Square crackdown; air pollution reached the "very high" level in a number of busy districts; U.S Tresury Secretary is due to arrive in Beijing tonight; Japan’s ambassador to the U.S has apologised for the treatment of U.S prisoners of war in WWII; Sri Lanka's courts will investigate or prosecute security personnel for any alleged human rights violations; deadline for bondholders of General Motors to accept a bankruptcy restructuring offer has come and gone; marine scientists and volunteers raced against time to try to save more than 50 pilot whales; the first of four government-funded support centres for ethnic minorities opened today; disposal of old games will become a new source of electronic waste; many schools have opened in Guangdong Province specialising in helping problematic teens; political groups and unions urged the government to strengthen support for low-income earners; Susan Boyle finished second in the finale of Britain's Got Talent.