The Acting Defense Secretary ultimately approved the forces at 5:08 pm Former Capitol Police chief Sund made 'frantic' call at 1:49 pm He is testifying at a Senate Homeland Security and Rules Committee hearing on the January 6th Capitol riot Army secretary 'withheld' authority for 'quick reaction force' in advance Walker said he found it 'unusual' the Army Secretary wanted a 'concept of operation' for the reaction force Walker said dispatching 155 Guard forces sooner 'could have made a difference' Guardsmen waited on buses at D.C. Armory while authorization came Army Secretary's approval required to move three Guardsmen to a traffic stop one block away