https://www.politico.com/news/2021/09/28/dhs-pentagon-jan-6-capitol-riot-514527
On Jan. 6, more than 30 minutes after the first attackers breached barricades erected to protect the Capitol, the Department of Homeland Security sent an incongruous update to the Pentagon.
“There are no major incidents of illegal activity at this time," read an internal Army email sent to senior leaders at 1:40 p.m. that day, referring to an update the service had just received from DHS’s National Operations Center (NOC).