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Among the biggest unknowns is when the confrontation began at the high school outside Houston between police and 17-year-old Dimitrios Pagourtzis, who authorities say opened fire on an art lab shortly after the first bell Friday morning. Pagourtzis wasn't hit in the attack even though officials have described him engaging in a drawn-out firefight with police.

Among the five areas that Clean Network tries to address — carrier, store, apps, cloud and cable — Hathaway said the "clean cloud" component is going to have more impact for US businesses than any of the measures.

Among the 697 key foreign companies monitored by the Shanghai Association of Foreign Investment, more than 90 percent of service sector companies are now running normally while 70 percent of manufacturing companies have picked up production.

Among the distinguished visitors to the Chinese university was former US President Jimmy Carter, who visited several labs and spoke with students.

Among people who want to hunt for new jobs when the epidemic ends, 83.3 percent of them choose to find jobs in local cities, while 23.5 percent will pursue career development in another city. Besides, 5.4 percent of working people plan to resign for further studies.