Bongino: Local Police was Posted to that Roof &thats why SS Couldnt Fire until they Saw Muzzle Flash

The hyro fluid covered motorcade vehicles delaying exit, and there was an explosion (the line being shot?)

""There was some type of small explosion afterwards and the advanced team, the cat team and other elements on the ground were not sure if they were still under attack, which makes some of the decisions even more questionable about keeping him on stage."