While there are currently no specific, credible threats, the 17th anniversary of the Sept. 11 terrorist attacks remains an attractive target for terrorists and extremists.
Terrorists and violent homegrown extremists show continued interest in targeting mass gatherings such as concerts and festivals. Historical methods of attack are mass shootings, knife attacks, explosives, and vehicle ramming. We should note one thwarted attack specifically targeted a 9/11 memorial stair climb in 2015.
First responders and the general public should be extra vigilant leading up to the anniversary, review potential indicators of pre-operational terrorist planning and suspicious activity, and report anything questionable immediately to the authorities. Potential indicators can include:Source: Nationwide Suspicious Activity Reporting Initiative