Before they opened fire at a holiday luncheon in San Bernardino, California, Syed Rizwan Farook and Tashfeen Malik practiced their shooting at gun ranges in the Los Angeles area, an FBI official said.

In fact, the married couple had target practice at least once within days of the massacre that left 14 dead, said David Bowdich, a top official in the FBI's Los Angeles field office.

Farook and Malik "were radicalized and have been for quite some time," Bowdich said.

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