From France to the U.S. terrorists ‘known to authorities’ carry out deadly attacks

In recent years, a troubling pattern has emerged in the wake of terrorist attacks, reports that national intelligence or security forces had the suspected terrorist under surveillance, or in some cases in custody, but let that individual go, only to find that person commit a horrible atrocity.

According to reports, the two suspects in the Thursday attack against French police on the Champs-Elysees were known to French anti-terrorism authorities. The suspected gunman, 39-year-old French national Karim Cheurfi had been released from prison last year for an earlier attempt in 2001 to shoot police after being caught in a stolen car. On Thursday he succeeded in killing one officer and injuring two others before being shot dead.