that s the time between his speech to supporters outside the white house, to the moment he asked the rioters who he called very special to leave the capitol and go home. the committee has said it may hold additional hearings, but tonight will deliver the main argument that the president could have called off the assault, but chose not to do so. let s head straight to capitol hill, and our correspondent nomia iqbal. give us a sense of who we are going to hear tonight. who are the key witnesses? 50. the key witnesses? so, the committee the key witnesses? so, the committee hasn t - the key witnesses? so, the committee hasn t officially | committee hasn t officially confirmed those witnesses yet. they have been quiet, it s been interesting throughout the hearings, they been reluctant to confirm it straightaway because of security issues, but it has been widely supported that we are expected to hear from two very key people that were part of donald trump s administration, so the for