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Chino police officers and San Bernardino County Sheriff's Department officers join Muslims from the Ahmadiyya Muslim Community for a vigil at the Baitul Hameed Mosque in Chino, California on December 3, 2015, to commemorate lives lost a day after the tragedy in San Bernardino. A young couple who killed 14 people in a shooting in California had amassed a huge arsenal and carefully planned their attack, authorities said, refusing to rule out terrorism.AFP PHOTO/ FREDERIC J. BROWN / AFP / FREDERIC J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Chino police officers and San Bernardino County Sheriff's Department officers join Muslims from the Ahmadiyya Muslim Community for a vigil at the Baitul Hameed Mosque in Chino, California on December 3, 2015, to commemorate lives lost a day after the tragedy in San Bernardino.    A young couple who killed 14 people in a shooting in California had amassed a huge arsenal and carefully planned their attack, authorities said, refusing to rule out terrorism.AFP PHOTO/ FREDERIC J. BROWN / AFP / FREDERIC J. BROWN        (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)