BEIJING — More than 48 hours after a car plowed down pedestrians and burst into flames at Beijing’s Tiananmen Square, the Chinese government broke its near-silence on the incident and characterized it as a “terrorist attack.’’ Chinese state media on Wednesday identified the people in the car as members of one family — the driver, Usmen Hasan; his mother, Kuwanhan Reyim; and his wife, Gulkiz Gini. All three were killed, along with two tourists. Chinese authories also said five people were also arrested as accessories in Beijing on Monday night. “The arrests were made 10 hours after the incident, which has now been identified as a terrorist attack,” state…