People place flowers to mourn the victims of the attacks on two mosques in Christchurch, New Zealand, on March 16, 2019. It was revealed that a 28-year-old Australian man, Brenton Tarrant, conducted terrorist attacks targeting mosques in Christchurch and later was arrested by New Zealand Police. At least 49 people were killed and 48 are hospitalized now. (Xinhua/Guo Lei)