Christopher Miller’s testimony will amount to the most thorough explanation of Pentagon actions after months of criticism that it took hours for the National Guard to arrive.
Police officials suggested that the fence remain in place until September, in part because investigators are tracking continuing threats against lawmakers and the Capitol complex.
Experts in homegrown extremism have warned for years about efforts by far-right militants and white-supremacist groups to radicalize and recruit people with military and law enforcement training.