Three active-duty Marines who work in intelligence – one of whom allegedly espoused support for a second civil war – were arrested this week for breaching the US Capitol building with a mob of Trump supporters on January 6, 2021.FBI agents first became aware of Coomer because he posted pictures of himself inside the Capitol building on Instagram, according to a federal affidavit.Abate, according to court documents, admitted that he had gone into the Capitol with two “buddies” during the riot when he was interviewed for a security clearance.A Marine Corps spokesperson said in a statement to CNN Friday that it is “aware of an investigation and the allegations” and is “fully cooperating with appropriate authorities in support of the investigation.”Investigators say that video footage from inside the Capitol shows Coomer moving through the building with two other men, later identified by their military identification cards as Abate and Hellonen.As the three men traversed the building, they allegedly went into the Capitol rotunda, placed a red MAGA hat on one of the statues and took a photo with it."