The Senate Homeland Security and Government Affairs and Senate Rules committees are holding an open hearing during which they will likely grill former US Capitol Police Chief Steven Sund, former House Sergeant at Arms Paul Irving, former Senate Sergeant at Arms Michael Stenger, and acting US Metropolitan Police Chief Robert Contee about how such a catastrophic failure occurred, and how to prevent it in the future.

Contee has already spoken before lawmakers in a closed-door hearing, but the testimonies of Irving, Stenger, and Sund could be monumental.

All three played critical roles in deciding how to prepare for the rally on January 6, and yet, Americans have heard hardly anything from any of them.

Sund has spoken sporadically.