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What it takes to enter the U.S. on a K-1 "fiancée" visa

San Bernardino shooter Tashfeen Malik, who killed over a dozen people in California with her 28-year-old husband Syed Farook, entered the United States from Pakistan via a K-1 "fiancée" visa. The visa, according to the State Department, requires a thorough vetting application process.
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