There is a domestic terrorism threat and thats why they are there
Where? News isn't reporting anything. Not that I have seen anyway.
Yes the news reported it. However you should go to the source.
www.dhs.gov
Summary
The Acting Secretary of Homeland Security has issued a National Terrorism Advisory System (NTAS) Bulletin due to a heightened threat environment across the United States, which DHS believes will persist in the weeks following the successful Presidential Inauguration. Information suggests that some ideologically-motivated violent extremists with objections to the exercise of governmental authority and the presidential transition, as well as other perceived grievances fueled by false narratives, could continue to mobilize to incite or commit violence.
Duration
Issued: January 27, 2021 11:00 am
Expires: April 30, 2021 01:00 pm