News At Seven-Thirty highlights: Donald Tsang decided to launch a pilot drug-testing scheme for youths; 78-year-old man was arrested in connection with the murder of his 67-year-old wife; Obama proposed over health care reform in U.S.; Italian prime minister says he has nothing to apologise for the sex scandals; a running battle between police and gunmen in central Mexico; about 8000 students signed up for courses under Project Yi Jin; home affairs chief will review the way museums are managed; an anti-terror drill was held at East Tsim Sha Tsui MTR station overnight; 5 labour unions for disciplined services demand to standardise salary structures; close to 34,000 people practiced tai chi outside Bird’s Nest; Californian sea lion is adopted by Berlin Zoo.