Dating sites for people with developmental disabilities
Malik was the first to pull the trigger when the couple gunned down her husband’s work colleagues at a Christmas party, it was revealed this weekend.
Although she only reportedly swore allegiance to Abu Bakr al-Baghdadi, Isil’s leader, the day before the murders on Facebook, the equipment used, which included homemade pipe bombs, and military vests, indicated it had been months in the making.
Investigators cautioned, however, that many of aspects of last week's event did not fit previous patterns.
Both developments strengthened the growing conviction that San Bernardino - a city of around 200,000 about 60 miles east of Los Angeles - had been the latest in a trend of Isil attacks on Western targets.
But Mr Comey added: "There's no indication that they are part of a network." What is not in doubt is the deadly violence the couple - parents of a six-month-old baby daughter - unleashed at a Christmas party for the county's department of public health.
Wearing black masks and tactical vests, husband and wife opened fire with two .222 calibre semi-automatic rifles and two nine milimetre semi-automatic handguns, killing 14 people and wounding 21 others, many of them critically.
The pair died in a hail of bullet in a gun battle that witnesses said resembled a war zone.
At the heart of the conundrum is why Farook, who was American-born to Pakistani parents, chose to launch a deadly assault on his colleagues, with whom he had been sitting at the Christmas event just half an hour earlier before leaving abruptly.