Experts hope to learn more about the groups more broadly through the House committee's investigation into the Jan. 6 insurrection. On Nov. 23, the House committee investigating the Jan. 6 attack on the U.S. Capitol by pro-Trump rioters issued a round of subpoenas that piqued the interest of domestic terror and extremism researchers: the far-right paramilitary groups known as the Proud Boys, the Oath Keepers, and the 1st Amendment Praetorian. It's no secret that members of these groups were involved in the insurrection, which led to multiple deaths and hundreds of injuries. Still, there are multiple questions about their role...