The Dec. 2, 2015 mass shooting at the Inland Regional Center in San Bernardino was the 13th deadliest in American history, and the worst terrorist attack on U.S. soil since 9/11. A decade later, the attack’s tragic echo lingers through memorials, traumatic memories and empty chairs at family gatherings. Southern California reporters Beau Yarbrough and Jeff Horseman – both reporters who covered the attack ten years ago – combed through public records, read reports and conducted new interviews to