One was a veteran police officer who didn't hesitate to run toward danger. Another had survived the deadliest mass shooting in modern U.S. history. Others were an "extremely nice" busboy and a Marine veteran who dedicated his life to service, including helping other veterans adjust to civilian life.

They were among a dozen people killed in a shooting at a country music bar in suburban Los Angeles on Wednesday night. Authorities believe the gunman, Ian David Long, ultimately killed himself.

The victims' stories are starting to emerge.

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