BEIJING — A strong earthquake killed at least 53 people in Tibet on Tuesday and left many others trapped as dozens of aftershocks shook the region of western China and across the border in Nepal. [time-brightcove not-tgx=”true”] The official Xinhua News Agency said 62 other people were injured, citing the regional disaster relief headquarters. About 1,500 fire and rescue workers were deployed to search for people in the rubble, the Ministry of Emergency Management said. The U.S.