Cathal Dennehy: Mass shooting risk casts dark shadow over US hosting of World Cup and Olympics

This was America at its worst: Kansas City, Wednesday afternoon. The Chiefs were back home for their victory parade and after all the speeches were done, a city united in celebration, the joy turned to terror.

GRIM REALITY: Abbie Lewis, left, and Jackie Batista-Martinez attend a candlelight vigil for the victims of a shooting at a Kansas City Chiefs Super Bowl victory rally last week. More than 20 people were injured and one woman was killed in the shooting near Union Station. Pic: Charlie Riedel, AP

THIS was America at its best: 16 seconds left in Super Bowl LVIII.

Patrick Mahomes passes to Travis Kelce, whose megastar girlfriend Taylor Swift was going wild up in the stands — along with 123m viewers across the country, the biggest US TV audience in history outside of the moon landing.