News At Seven-Thirty highlights: MTR Corporation defended against allegations it tried to undermine press freedom; U.S. started using armed drones against troops loyal to Muammar Gaddafi; more information of the murder of a Chinese university student in Toronto is released; China and the United States will hold talks on human rights in Beijing next week; Thailand and Cambodia exchanged artillery and gunfire for several hours along the disputed frontier; Mario Vargas Losa thanked Argentina for preventing intellectuals from blocking his keynote address; CustomsDepartment claims Mong Kok’s Ladies Market is no longer black spot for pirated goods; a group of Tuen Mun residents and activists rallied against goverment plans to build incinerators; number of holidaymakers leaving HK is expected to peak today; former HK soccer captain Chiang Sai Ho was found dead in Tin Shui Wai this morning.