San Bernardino shooters die battling police

San Bernardino, California (CNN) – It started at a holiday party — perhaps with a slight or a testy exchange, something that prompted Syed Rizwan Farook to storm off angrily.

It ended in a bloodbath with 14 people dead and 17 more wounded — the deadliest mass shooting in the United States since Sandy Hook.

At its center, a couple, Farook and Tashfeen Malik.

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Dressed in black, carrying semi automatics, they unleashed a massacre Wednesday at the Inland Regional Center, a facility for the developmentally disabled in San Bernardino, California.