Muhammad Youssef Abdulazeez, identified as the July 16, 2015 shooter of four Marines at a Naval Reserve Center in Chattanooga, Tennessee, maintained a blog containing two Islam-focused posts made just three days before the attack.
On May 3, the Twitter account of “Shariah is Light”—later revealed to be an Arizona man and subject of terror investigations, Elton Simpson—would hint at responsibility for an upcoming terror attack in Garland, Texas and claim allegiance to IS on behalf of himself and the other attacker:
Christopher Lee Cornell, the 20 year old Cincinnati man also using the online persona "Raheel Mahrus Ubaydah" on social media, was arrested by the FBI Joint Terrorism Task Force on January 14, 2015 for allegedly planning to plant pipe bombs at the U.S. Capitol and then open fire on those nearby.
A pro-Islamic State (IS) hacking group calling itself the "CyberCaliphate" claimed hacking the Twitter and YouTube accounts of the U.S. Central Command (CENTCOM), posting on them IS videos and alleged documents it stolen from networks and personal devices.
The U.S. Senate's report on the CIA's post-9/11 interrogation tactics, which included graphic accounts of torture, has ignited an overwhelming response from the online jihadist community, with many calling for retaliation against the U.S. and promoting jihad.