Independence Day celebrations in the United States have been rattled by a shooting that left at least six people dead at a parade in Illinois. The shooting further rocked a nation already awash in turmoil over high court rulings on abortion and guns as well as hearings on the Jan. 6 insurrection. Police say at least 30 other people were wounded in the attack in the Chicago suburb of Highland Park. Authorities brought a person of interest into custody Monday evening. The latest mass shooting came as the nation tried to find cause to celebrate its founding and the bonds that still hold it together.