The Manchester suicide bomber was reported to authorities repeatedly over a period of five years, as British citizens pointed out his radical activities. Nothing was done. It mirrors the script of previous jihadists who struck at San Bernardino, Orlando, Fort Hood, the Boston Marathon, London, Nice and many other places in the U.S. and Europe over the last three years. “We knew of this man,” police said, but they were either unwilling or unable to monitor the suspect, let alone arrest him. Now there are signs that two Muslim men in Minneapolis may be up to their eyeballs in jihadist activity.