Flags are flown at half-mast (or half-staff) as a symbol of respect, mourning, or distress , often to honor the memory of someone who has died or to mark a tragic event. The tradition involves lowering the flag to a position below the top of the flagpole, usually about halfway down, to show solemnity. It originated in the 17th century and is used in many countries for similar reasons, including honoring national leaders, victims of disasters, or tragedies. Most recently, flags have been at half-staff in the United States to honor the victims of a mass shooting at a Catholic school in Minneapolis, reflecting a national moment of mourning as ordered by the President. This gesture signals respect for those who lost their lives and is common during periods of national or local tragedy.