特朗普下令，白宫降半旗哀悼

Group 1 - A shooting incident occurred at a school in Minneapolis, resulting in three deaths, including the shooter and two children, with 17 others injured [2][3] - The shooter, identified as 23-year-old Robin Westman, had no prior criminal record and acted alone, firing from a church window at children sitting on benches [3][5] - Following the incident, the shooter committed suicide, and he was armed with multiple weapons, including a rifle and a handgun [5] Group 2 - Minnesota Governor Tim Walz expressed that the incident left the state "heartbroken" and emphasized the desire for no community or school to experience such a tragedy [6] - President Trump ordered flags at the White House and all federal buildings to be flown at half-staff until sunset on August 31 to honor the victims [7] - The shooting was noted as the fourth fatal shooting incident in Minneapolis within 24 hours, with a total of 9,792 gun violence deaths and 17,901 injuries reported in the U.S. for the year up to August 27 [8]