Please see vids of tunnels and subways under the capitol (scroll about 1/3 way down). This is only what they are willing to show us. Pretty sure the ambulance could have another access point. Methinks a senator having a heart attack is not going to be hauled out the front door down the steps.
Wow, check this out. Your tunnel link led to this one:
” Although he had no direct knowledge of the Capitol Police’s specific policies, he confirmed that the application of the tape is not a totally uncommon practice. It is used to differentiate “non-combatants from combatants in a crowded situation,” and helps officers make the right split-second decisions as to whether to engage a target or not. “
So the guy who shot Ashli didn’t have the reflective tape. Is that a clue?