Accident

They were college seniors

The agent was dancing when the gun fell from his holster and accidentally fired

Hollie Mackey was seated in the aisle seat on the same row as Jennifer Riordan

The incident was captured on the officer's dashcam

One passenger went missing overboard while another fell to her death on separate Carnival Cruise Line ships

The 26-year-old daredevil Wu Yongning was attempting a "rooftopping" challenge