Countries Under U.S. Entry Ban Aren’t Main Sources of Terror Attacks

Data show some high-profile attacks were carried out by people born in the U.S.
In The News Piece in Wall Street Journal
Leonard Zhukovsky / Shutterstock, Inc. S M L Size Guide
Jan. 29, 2017

International Security's “Terrorism in America After 9/11” project was cited in the Wall Street Journal:

The Journal analyzed U.S. law enforcement records on terror-related plots and arrests that were compiled by the nonpartisan New America Foundation. The data include those charged with conducting attacks, killed while executing attacks, taking steps toward violence in the U.S., or materially supporting terrorism.
...
The data from the New America Foundation is similar to other estimates that have emerged since Mr. Trump signaled his immigration crackdown and that have been cited by those critical of Mr. Trump’s immigration ban, even if they think some changes are warranted.
...
Approximately 85% of all suspects who took steps toward terrorist-related violence inside the U.S. since the Sept. 11 attacks were U.S. citizens or legal residents and about half were born U.S. citizens, New America Foundation officials calculated. Birthplaces couldn’t be definitively determined in 10 of the cases.