A man who works for Homeland Security was arrested earlier this month after allegedly planning an attack on headquarters in Washington D.C. From ABC News:
Federal prosecutors are investigating whether a Department of Homeland Security employee with top-secret clearance was planning an attack at the agency's Washington headquarters when he entered the building with a gun, a knife, an infrared camera, pepper spray and handcuffs.
Jonathan Wienke, and analyst in the Office of Intelligence and Analysis, allegedly carried the weapons into the building on the morning of June 9. Court documents filed by the federal government state that investigators have probable cause to believe Wienke "was conspiring with another to commit workplace violence, and more particularly may have been conspiring or planning to commit violence against senior DHS officials in the building."
In his affidavit for a search warrant, Department of Homeland Security Special Agent Eric Mann listed the potential crimes as attempt and conspiracy to assassinate, kidnap or assault a member of the executive branch of the government, false impersonation of a federal officer and possession of a firearm in a federal facility.
It is illegal to bring a firearm into the District of Colombia without registration or permit.
“Initial reports of this incident are very troubling, and my Committee is looking into this serious matter. DHS has been in contact and we will continue to engage with the appropriate officials to gather all the facts," House Homeland Security Committee Chairman Michael McCaul released in a statement Wednesday.
Keep in mind Orlando terrorist Omar Mateen, who murdered 49 people at the Pulse Nightclub, was employed as a professional, licensed and armed security guard by G4S. G4S is a security company contracted by DHS to protect nuclear facilities and a number of federal buildings.