America’s Spy System: Why didn’t it work?

If the US National Security Agency’s massive electronic spy system didn’t catch the murderous jihadist lovers, Tashfeen Malik and Syed Farook, what is it for?

Tashfeen entered the United States in July of 2014 on a K-1 visa for fiancées on a Pakistani passport, according to authorities, who began excavating for details of her arrival after she and her Il…