Reuters: WASHINGTON/SAN BERNARDINO, Calif. | By Mark Hosenball and Yasmeen Abutaleb The FBI is investigating this week’s massacre in which a married couple killed 14 people in California as an “act of terrorism,” an official said on Friday, as sources said that the female shooter apparently pledged allegiance to a leader of the militant group Islamic State. Tashfeen Malik, 27, […]