Militia Link Suspected In Acts Against Federal Land Workers The Fbi Is Examining March Bombings Of Forest Service In Nevada. - Philly.com
Like I stated previously, militia groups and terrorist groups don't die off or fade away into obscurity, they lay low, and come back to make trouble in years following initial attacks.
In this link, the story outlines violence and threats against forest service workers and BLM employees.
Here is a link to PEER research findings.